Option B. Precipitation falls from the clouds: water runs off into the ocean; water evaporates from Earth's surface; water vapor condenses in the air, describes the events of the water cycle in the correct order.
The continual circulation of water on, above, and below the Earth's surface is referred to as the "water cycle," sometimes known as the "hydrologic cycle" or the "hydrological cycle."
Evaporation and transpiration: The heat from the sun heats lakes, rivers, oceans, bogs, and other bodies of water, raising the temperature of the water within them. As a result, some water releases vapor into the atmosphere. The vapor is carried into the sky by rising air currents. Likewise, water is lost by plants and trees to the atmosphere in the form of a vapor that rises into the sky. Condensation: The cooler temperatures cause the vapors to cool down as they rise high before condensing back into liquid. The movement of moisture by wind and air currents causes clouds to develop. Precipitation: The particles in the clouds collide due to wind motions. Precipitation is the process through which these water-laden clouds transform into rain-bearing clouds and return to the earth's surface. Depending on the temperature, this could take the form of rain, hail, snow, or sleet.Infiltration and Runoff: The precipitation either soaks into the soil or runs off into the rivers, oceans, and ground surface (infiltration)To know more about the water cycle try:https://brainly.com/question/25796102which type of environmental scientist is likely to study methods of water conservation and decontamination? a. hydrologist b. toxicologist c. oceanographer d. ecologist please select the best answer from the choices provided a b c d
Hydrologist is likely to study methods of water conservation and decontamination.
A person who studies the distribution, quality circulation, and "physical properties" of the water on Earth's surface is known as a hydrologist. They investigate the reactions that occur when water reaches the surface of the earth, such as how snow and rainwater penetrate the soil and become groundwater. They investigate how surface water and groundwater evaporate back into the atmosphere or ultimately reach the oceans, as well as how rain, snow, and other forms of precipitation affect river flows or groundwater levels.
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How can two plant cells from the same plant have different structures and functions?
O Genes do not control the structure and function of a plant cell.
O Sexual reproduction provides for genetic variation in plant cells.
O Certain genes are turned on in one cell and turned off in the other cell.
O Different cells in the plant have different DNA.
Answer:
The correct answer is C. Certain genes are turned on in one cell and turned off in the other cell.
Explanation:
Plant cells, like all cells, are controlled by their DNA, which contains the instructions for the structure and function of the cell. However, not all of the instructions in a cell's DNA are active at the same time. Instead, certain genes are turned on or off in different cells, allowing the cells to have different structures and functions. For example, a leaf cell may have genes turned on that allow it to produce chloroplasts and perform photosynthesis, while a root cell may have genes turned on that allow it to absorb water and nutrients from the soil. By turning on and off different sets of genes, cells in a plant can specialize and perform different roles within the plant.
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some hormones such as estrogen and testosterone are lipids and are therefore nonpolar. explain why a plasma membrane receptor would not be used for this type of ligand to activate a cellular response.
The hormones can diffuse through the cell membrane without a protein channel because they are nonpolar.
Small can easily traverse cell membranes because they are soluble in the lipid bilayer. Examples of these molecules include O2 and CO2. Larger uncharged polar molecules, like glucose, cannot diffuse through membranes, whereas small uncharged polar molecules, like H2O, may.
The cell membrane can be easily traversed by small, nonpolar molecules. Polar molecules (like water) and ions cannot, however, due to the hydrophobic nature of the lipids that make up cell membranes.
The alternative is that they diffuse across the membrane through transport proteins.
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endocannabinoid binding to neuronal cb1 receptor causes: a) closure of pre-synaptic potassium channels b) closure of pre-synaptic calcium channels c) increase in glutamate release d) none of the above
According to research19 showing that THC's binding to CB1 affects immune function in rodents, exogenous cannabinoids may influence these cells directly through cannabinoid receptor activation.
THC has also been demonstrated to inhibit the production of pro-inflammatory cytokines in human peripheral lymphocytes.
Because there is a limited amount of presynaptic calcium ions entering, endocannabinoids released from the depolarized post-synaptic neuron bind to CB1 receptors in the pre-synaptic neuron and reduce GABA release.
They can be discovered in more body locations. The central nervous system contains a large number of cannabinoid CB1 receptors, which control neuronal transmission as well as other important physiological processes like those causing pain, inflammation, memory loss, and eating behavior.
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how many different hapticities can the ligand c4h4 provide to a metal center and what are the electron counts of each hapticity?
The hapticity of a ligand is determined by the number of atoms of the ligand that are coordinated to the metal centre. In the case of the ligand C4H4, there are several different hapticities that it can provide to a metal centre.
Hapticity, or coordination mode, is an important concept in coordination chemistry as it relates to the number and geometry of ligands bound to a metal centre. The most common hapticity of C4H4 is the tetrahedral hapticity, where four carbon atoms of the ligand are coordinated to the metal centre. In this case, the electron count of the hapticity is 16 electrons, 8 from the four carbon atoms and 8 from the four attached hydrogen atoms.
The next hapticity of C4H4 is the trigonal bipyramidal hapticity, where three carbon atoms of the ligand are coordinated to the metal centre. In this case, the electron count of the hapticity is 14 electrons, 6 from the three carbon atoms and 8 from the four attached hydrogen atoms.
The last hapticity of C4H4 is the square-planar hapticity, where two carbon atoms of the ligand are coordinated to the metal centre. In this case, the electron count of the hapticity is 12 electrons, 4 from the two carbon atoms and 8 from the four attached hydrogen atoms.
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which of these organisms convert atmospheric nitrogen gas to a form that can be utilized by plants?
a. bacteria
b. animals
c. fungi
d.protists
The organisms that convert atmospheric nitrogen gas into a form that can be utilized by plants are the bacteria that are present in Option a, the bacteria that are present either freely or in association.
What is nitrogen fixation?The nitrogen fixation is caused by bacteria that can convert the atmospheric nitrogen into the usable form of nitrogen, and these bacteria can show mutualism by being present in the root nodules or living freely and doing nitrogen fixation.
Hence, the organisms that convert atmospheric nitrogen gas into a form that can be utilized by plants are the bacteria that are present in Option a.
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in the first part of the dna isolation, you discarded the supernatant and kept the cells. however, after processing the sample with chelex®, you kept the supernatant and discarded the pellet. tracing the path of your dna, explain the goal of each processing step.
To just examine the sequences, we extracted the DNA within the cell. Once our DNA sequences had been cut using a restriction enzyme according to the specific nucleotide strands, we performed gel electrophoresis to see our genotype.
Why is the initial step in isolating DNA from your cells, cell lysis?It is essential to the first stage of protein or nucleic acid extraction because it helps with the chemical breakdown of cell membranes and compartments, allowing for the exit of target molecules.
What are three reasons why obtaining human DNA might be beneficial?Several processes involve removing DNA from human cells. A newborn can be tested for a hereditary illness using a clean DNA sample.
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Which internal structures of animals are specifically adapted to use contraction to cause movement?A.Blood cellsB.onesC.GlandsD.Muscles
Muscle contraction-specific cells exist. Walking is made possible by muscles, and they also support physiological functions including digestion and respiration.
Skeletal muscle, cardiac muscle, and smooth muscle are the three different forms of muscle found in the body.
Skeletal muscle tissue develops into skeletal muscles, which connect to bones or skin and regulate movement that can be consciously controlled as well as locomotion. Skeletal muscle is also referred to as voluntary muscle because it may be directed by mind. Skeletal muscles are long and cylindrical in shape, and their tissue appears striped or striated when seen under a microscope.
The consistent arrangement of contractile proteins is what causes the striations (actin and myosin). Actin, a globular contractile protein, works with myosin to contract muscles. Multiple nuclei can be found in a single cell of skeletal muscle as well.
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scientists mate two parrots from different populations to see if speciation has occurred. the parrots mate over and over again, but the male sperm never fertilizes the female egg. What type of reproductive barrier might be operating?
Answer: Prezygotic barrier
Explanation: If the male sperm never fertilizes the female egg in a mating between two parrots from different populations, a prezygotic reproductive barrier may be operating. Prezygotic barriers prevent fertilization from occurring by blocking mating or fertilization between individuals of different species. In this case, the male and female parrots may be genetically incompatible and unable to produce viable offspring, even though they are able to mate. This type of reproductive barrier can arise as a result of speciation, where two populations evolve into distinct species over time. Other examples of prezygotic barriers include physical differences in reproductive organs and behavioral differences that prevent mating.
5. Translation takes place inside the nucleus of a cell *
O True
O False
Answer:
False
Explanation:
Cytoplasm
Replication and transcription occur in the nucleus but translation occurs in the cytoplasm.
Which of the following would NOT be considered growth and development?
Group of molecules that are attracted together to form a larger sheet would not be considered growth and development.
What is growth and development?
Child development experts define growth as an unceasing, irreversible increase in size and development as an increase in psychomotor capacity. Both processes rely heavily on a person's genetic make-up, diet, and environment.
What traits characterise development and growth?
The term "growth" describes an increase in the size and mass of an organ or a body. Cell division and an increase in intracellular material are the usual mechanisms. Development is the maturing of an organism's physiology and functionality.
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Group of molecules that are attracted together to form a larger sheet would not be considered growth and development.
What is growth and development?Child development experts define growth as an unceasing, irreversible increase in size and development as an increase in psychomotor capacity. Both processes rely heavily on a person's genetic make-up, diet, and environment.
What traits characterise development and growth?The term "growth" describes an increase in the size and mass of an organ or a body. Cell division and an increase in intracellular material are the usual mechanisms. Development is the maturing of an organism's physiology and functionality.
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organisms that live on land are fundamentally the same as organisms that live in aquatic environments.truefalse
Organisms that live on land are fundamentally the same as organisms that live in aquatic environments is True.
While both land organisms and aquatic organisms are all living organisms, the environments in which they live can vary drastically. Land organisms must be adapted to survive and thrive in a dry, terrestrial environment, while aquatic organisms must be adapted to survive and thrive in an aquatic environment that is usually much wetter and more oxygenated.
Land organisms must be able to cope with changing temperatures, air movement, and other environmental conditions. They must also be able to survive without direct access to water, and may need to store water or find ways to conserve it in order to stay hydrated. In addition, they must be able to obtain food and energy from the land and rely on different strategies to find and store food.
In contrast, aquatic organisms must be adapted to survive in an aquatic environment. They must be able to cope with changing water temperatures, currents and other environmental conditions. They must also be able to extract oxygen from the water, and filter or process food particles. Many aquatic organisms also rely on specific types of algae or other organisms for food.
Overall, while both terrestrial and aquatic organisms must be adapted to survive in their respective environments, the adaptations they require are very different. This means that while they are both living organisms,
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some bacteria possess antibiotic resistance, as well as the ability to survive through adverse conditions. where in this type of bacteria is the dna located?
Some bacteria can withstand harsh environments and resist antibiotic resistance to their "plasmids, nucleoids, and endospores".
Since bacteria are prokaryotic creatures, their cells lack a clearly defined nucleus. However, according to this query, certain bacteria are reported to be resistant to antibiotics and to be able to endure harsh environments. The presence of a plasmid and endospore in some bacteria is thought to be antibiotic resistance for these two traits. Circular extra-chromosomal DNA that is present in bacteria is known as a plasmid. Because it differs from the DNA of the bacterium and contains distinct genes, it is referred to as "extra." The genes found in plasmids frequently provide bacteria extra advantages like antibiotic resistance to antibiotics.
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the enzyme rubisco can catalyze two seemingly conflicting reactions. it is both a carboxylase and an oxygenase. when the enzyme first evolved, why was this probably less of a problem?
The enzyme rubisco can catalyze two seemingly conflicting reactions, it is both a carboxylase and an oxygenase because when the enzyme first evolved there was very little oxygen in the primitive atmosphere.
What is a biological enzyme catalyst?A biological enzyme catalyst is a protein capable of reducing the activation energy requires to carry out a chemical reaction such as in this case the rubisco enzyme which acts both as oxygenase and carboxylase.
An oxygenase is an enzyme that catalyzes the addition of molecular oxygen, while a carboxylase is an enzyme that catalyzes the addition of carbon, which was facilitated in the primitive highly rich carbon atmosphere.
Therefore, with this data, we can see that a biological enzyme catalyst such as rubisco is able to catalyze the addition of oxygen and carbon, which was likely due to the conditions of the primitive atmosphere.
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Describe how the body can maintain
homeostasis after there is a rise in blood sugar
levels after eating. Be sure to include the
following terms in your response:
(6 points)
Pancreas
Insulin
Glucose
Body cells
☐ Receptors
Blood
The body can maintain homeostasis after there is a rise in blood sugar levels after eating by releasing the insulin that is released from the pancreas and the glucose that is stored in the body cells.
What is the significance of blood glucose levels?After eating, generally, the blood glucose level is high, but when the pancreas releases the insulin, it then binds to the receptor (GLUT) of the liver and muscles, and then the glucose in the blood is taken and stored as glycogen.
Hence, the body can maintain homeostasis after there is a rise in blood sugar levels after eating by releasing the insulin that is released from the pancreas and the glucose that is stored in the body cells.
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assuming resting conditions at sea level, what is the partial pressure of carbon dioxide in systemic veins
Assuming resting conditions at sea level, the partial pressure of carbon dioxide in systemic veins is 46 mm Hg.
What is the carbon dioxide partial pressure in systemic veins?In systemic veins, the partial pressure of carbon dioxide is 46 mm Hg. Alveoli have a low partial pressure of carbon dioxide compared to lung capillaries.
Carbon dioxide concentration is high in the veins as compared to the arteries because veins carry deoxygenated blood from body to the heart chambers. Thus, amount of oxygen is low in comparison to carbon dioxide.
Using network of arteries, veins and capillaries, the blood carries carbon dioxide to lungs and picks up oxygen.
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describe what happens in the embryonic stage of development. describe what happens in the fetal stage of development.
The embryonic stage of gestation is the period after implantation, during which all the major organs and structures within the growing mammal are formed. Once the embryo is fully formed, it expands, grows, and continues to develop in what is known as the fetal development stage.
The initial stages of a multicellular organism's development. In sexually reproducing mammals, embryonic development begins as soon as the male sperm cell fertilizes the female egg cell. The zygote, which is made up of these two cells together, divides repeatedly to produce blastomere cells. The blastocoel, a hollow structure made of fluid that eventually fills the solid ball-shaped morula that make up the blastomeres. The object is subsequently referred to as a blastula or, in the case of animals, a blastocyst.
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if daughter cells produced by meiosis have a mixture of paternal and maternal chromosomes this is due to:
Answer:
independent assortment
Explanation:
What are the products of each stage of photosynthesis; what does the light reactions make and how is some of that used in the calvin cycle
The product of each stage of photosynthesis are ATP and NADPH; the light reaction to produce glucose in the Calvin Style through 3 main steps that are carbon fixation, reduction, and regeneration.
INTERPRETATION
In the Calvin cycle, carbon atoms of CO2 are fixed (assembled into organic molecules) and used to make three-carbon sugars. This process is fueled by, and depends on, the ATP and NADPH from the light reactions. In contrast to the light reactions that occur in the thylakoid membranes, the reactions of the Calvin cycle occur in the stroma (the space within the chloroplast).
Three turns of the Calvin cycle are required to make one G3P molecule that can leave the cycle and go on to make glucose. Let's summarize the number of key molecules that enter and exit the Calvin cycle as the G3P network is created. In three cycles of the Calvin cycle:
Carbon. 3 CO2 combine with 3 RuBP acceptors, yielding 6 molecules of glyceraldehyde-3-phosphate (G3P).1 G3P molecule leaves the cycle and goes to produce glucose.5 G3P molecules are recycled, regenerating the acceptor molecule RuBP.ATPs. 9 ATP are converted to 9 ADP (6 during fixation step, 3 during regeneration step).NADPH. 6 NADPH is converted to 6 NADP+ (during the reduction step).The G3P molecule contains three fixed carbon atoms, so two G3P are required to build a six-carbon glucose molecule. It takes six turns of the cycle, or 6 CO2, 18 ATP, and 12 NADPH, to make one glucose molecule.
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the growth hormone axis contains at least one example of a negative feedback loop. State True or False your answer:
a. True
b. False
Answer:
a. True
Explanation:
Classical studies suggest that growth hormone (GH) secretion is controlled by negative-feedback loops mediated by GH-releasing hormone (GHRH)- or somatostatin-expressing neurons. Catecholamines are known to alter GH secretion and neurons expressing TH are located in several brain areas containing GH-responsive cells.
based on figure 1, what percent of the time required to complete a full cycle do the cells typically spend in interphase?
Answer:
90%
Explanation:
During interphase, the cell undergoes normal growth processes while also preparing for cell division. It is the longest phase of the cell cycle, cell spends approximately 90% of its time in this phase. In order for a cell to move from interphase into the mitotic phase, many internal and external conditions must be met.
Based on the given figure, 90% of the time required to complete a full cycle do the cells typically spend in interphase.
What is interphase?The interphase, which can be divided into two stages: the first gap (G1) between the final mitosis and the DNA-synthesising S phase.
The second gap (G2) between the end of the S phase and the subsequent mitosis, is the time when the cell is not actively dividing (M).
A cell spends the majority of its time in what is known as interphase, where it develops, duplicates its chromosomes, and gets ready to divide. The cell then exits interphase, goes through mitosis, and finishes dividing.
However, since mitosis and cytokinesis only last for about an hour each, interphase the time in between mitoses is where 90% of the cell cycle is spent.
Thus, the total of 90% is required for interphase.
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Your question seems incomplete, the missing image is:
Complex microbial communities that grow tightly adhered to surfaces are called __________.
A. polysaccharide clusters
B. growth communities
C. film residues
D. biofilms
Complex microbial communities that grow tightly adhered to surfaces are called biofilms.
Biofilm is indeed a complex microbiome structure composed of different bacteria living or single types of cells that stick to the surface. Microorganisms adhere to surfaces and form biofilms. Biofilm-associated cells can be distinguished from their suspended counterparts by the production of the an extracellular polymeric substance (EPS) matrix, slower growth rates, and the regulation of specific genes.
Attachment is a complex process that is influenced by the growth medium, substratum, as well as cell surface. An established biofilm structure is composed of microbial cells and EPS, does have a defined architecture, but also provides an optimal environment for cell-to-cell genetic material exchange. Cells also may communicate through quorum sensing, which may affect biofilm processes like detachment.
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apoptosis is a term describing the process by which cells stop dividing and die. it is a normal part of an organism’s life cycle. apoptosis is carefully controlled by enzymes within the cell. what would happen if the genes used to synthesize these enzymes were mutated?
If the genes used to synthesize the enzymes that control apoptosis were mutated, it could lead to problems with the normal life cycle of cells.
Apoptosis is a normal part of an organism's life cycle, and it is important for maintaining the balance between cell proliferation and cell death. When cells become damaged or are no longer needed, they undergo programmed cell death, or apoptosis, to remove them from the organism. If the genes that encode the enzymes that control apoptosis are mutated, it could disrupt the normal process of cell death, leading to problems such as the accumulation of damaged or unnecessary cells, or the inability of the organism to replace damaged or lost cells. This could have a range of effects on the health and function of the organism, depending on the specific cells affected and the severity of the mutation.
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question 3 if a population is at hardy-weinberg for a locus with two alleles, is there any allele frequency at which the heterozygote frequency is lower than both (individually) of the two homozygous frequencies? for example, with alleles a and a, and assuming hw, is there a frequency of a (called p) wherein the expected aa genotype frequency is rarer than the expected aa frequency and the expected aa frequency is rarer than the expected aa frequency?
In a population at Hardy-Weinberg equilibrium for a locus with two alleles, there is no allele frequency at which the heterozygote frequency is lower than both of the two homozygous frequencies.
Under Hardy-Weinberg equilibrium conditions, the frequency of heterozygotes (individuals with one copy of each allele) is equal to the product of the frequencies of the two alleles. This means that the frequency of heterozygotes can never be lower than the frequencies of either of the two homozygotes (individuals with two copies of the same allele). In other words, if a population is at Hardy-Weinberg equilibrium for a locus with two alleles, there is no allele frequency at which the heterozygote frequency is lower than both of the two homozygous frequencies. For example, consider a locus with two alleles, A and a. Let p be the frequency of the A allele and q be the frequency of the a allele. The Hardy-Weinberg equilibrium equation for the frequency of heterozygotes (individuals with one copy of each allele) is: Heterozygote frequency = pq The Hardy-Weinberg equilibrium equation for the frequency of homozygotes (individuals with two copies of the same allele) is: AA frequency = pp aa frequency = q^2. Since p and q are between 0 and 1, it is not possible for either p or q to be less than 0, and therefore it is not possible for either p^2 or q^2 to be less than 0. Therefore, it is not possible for the frequency of either of the two homozygotes to be less than 0. Since the frequency of heterozygotes is equal to pq, which is the product of p and q, and since both p and q are greater than or equal to 0, it is not possible for the frequency of heterozygotes to be less than either of the two homozygotes. Therefore, in a population at Hardy-Weinberg equilibrium for a locus with two alleles, there is no allele frequency at which the heterozygote frequency is lower than both of the two homozygous frequencies.
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Farmer Brown tet the hypothei that the more alfalfa prout cattle eat, the more milk they produce. He divide hi pature into four field and put twenty cattle in each field. Field 1 cow get no alfalfa prout, field 2 cow get ten pound of prout per day, field 3 cow get twenty pound of prout, and field 4 cow get thirty pound. He feed all group fifty pound of regular hay per day, ue the ame breed of cattle, and give them the ame amount of water. He meaure gallon of milk produced per cow every day. What i the independent (teted) variable in Farmer Brown' experiment?
The independent (tested) variable in Farmer Brown's experiment is the amount of alfalfa prout given to the cattle. This is the factor that Farmer Brown is manipulating in order to test the hypothesis that the more alfalfa prout cattle eat, the more milk they produce.
By dividing his pasture into four fields and giving each field a different amount of alfalfa prout, Farmer Brown is able to measure the effect of the amount of alfalfa prout on milk production. All other factors, such as the breed of cattle, the amount of regular hay per day, and the amount of water, are held constant. By keeping these variables constant, Farmer Brown is able to measure the effect of the independent variable, the amount of alfalfa prout, on milk production.
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Which two types of biomolecules contain only carbon, hydrogen, and oxygen?
A. Carbohydrates and proteins
OB. Carbohydrates and lipids
C. Nucleic acids and proteins
OD. Lipids and nucleic acid solution ok zit p
The correct option is B Carbohydrates and lipids.
Biomolecules - A chemical compound that is present in living organisms is called a biomolecule. These consist primarily of substances with the chemical elements carbon, hydrogen, oxygen, nitrogen, sulfur, and phosphorus.
Carbohydrates - They include sugars and starch. The elements present in these compounds are carbon, hydrogen, and oxygen. Carbohydrates in living things form specific structures, store energy, and give energy to the cells (such as the cell walls of plants).
Lipids - They include fats and oils. Although some lipids do contain other elements, like phosphorus, their main constituents are carbon, hydrogen, and oxygen. In living things, lipids serve as energy stores, building blocks of cell membranes, and messenger molecules.
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secretions of the female reproductive system mostly serve to ____________ the reproductive organs involved with intercourse.
Secretions of the female reproductive system mostly serve to lubricate the reproductive organs involved with intercourse.
The female reproductive system consists of internal and external organs. It creates hormones and is responsible for fertility, menstruation, and sexual activity. The female reproductive anatomy includes both external and internal parts. The function of the external genitals is to protect the internal parts from infection and allow sperm to enter the vagina.
The female reproductive system provides several functions. Ovaries produce eggs. These eggs are then transported to fallopian tube during ovulation where fertilization may occur.
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true or false: crossing over can occur between nonhomologous chromosomes. if false, make it a correct statement.
Given statement is false because different genes are present on nonhomologous chromosomes.
What is nonhomologous chromosomes?Chromosomes that are non-homologous are those that do not come from the same pair. Non-homologous chromosomes typically differ from homologous chromosomes in terms of the length of the arms and the location of the centromere. As a result, meiosis does not pair non-homologous chromosomes.
This indicates that females have a total of 23 pairs of homologous chromosomes, including 1 pair of sex chromosomes and 22 pairs of autosomes (non-sex chromosomes). On the other hand, males have a non-homologous pair of sex chromosomes, or XY, as their 23rd pair of chromosomes.
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Which one of the following statement is correct about chromosomal theory?A
Pairing and saparation of a pair o chromosomes would lead to the segregation of a factor they carried
B
Beheviour of chromosomes is parallel to the behaviour of genes
C
The two alleles of a gene pair one located on homologous sites on homologous chromosomes
D
Chromosomes as well as genes occur in pairs
Pairing and separation of a pair o chromosomes would lead to the segregation of a factor they carried statement is correct about chromosomal theory.
A chromosome is a lengthy DNA molecule that contains the entirety or a portion of an organism's genetic code. The majority of the extraordinarily long, exceedingly thin DNA fibers that make up chromosomes are covered by histones, the most important of these proteins in eukaryotic cells. These proteins condense and bind to the DNA molecule with the aid of chaperone proteins to maintain the integrity of the DNA molecule. The intricate three-dimensional structure of these chromosomes is essential for regulating transcription.
Often, during the metaphase of cell division, chromosomes can be observed using a light microscope (where all chromosomes are aligned in the center of the cell in their condensed form). Before division (S phase), each chromosome is duplicated, and a centromere joins the two copies.
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What happens to the amount of DNA in the nucleus just before the beginning of mitosis and why?
A The amount of DNA is doubled so that the two new cells each have the same original amount.
B The amount of DNA stays the same so the new cells have the same original amount.
C Nothing happens to the amount of DNA
D The DNA leaves the nucleus to become more
Answer: A. The amount of DNA is doubled so that the two new cells each have the same original amount.
Explanation:
I will say the answer to this question is A; I am pretty sure. I remember learning that DNA makes a copy of itself before the beginning of mitosis. If I am wrong, I am sorry; it has been a long time since I learned this.