Answer:
to produce gamate or reproductive cells.
to distinguish between male and female specie.
to produce tetrads having equal number of chromosomes
Which process causes hillsides and mountains to gradually get smaller?
The answer is Physical Erosion
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According to the cell theory, cells make up every biological entity; they are the basic building block of life, and all life originates from earlier forms of life.
What are the three tenets of the theory of cells?1) Cells make up all living things. 2) All of the existing cells were created by other live cells. 3) The simplest form of life is the cell.
Who coined the term "cell theory" and what is it?Theodor Schwann put forth the classic cell theory in 1839. This theory consists of three components. Including the first section, cells make up all organisms. The basic building blocks of life are cells, according to the second section.
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What are the 4 common characteristics used to describe bacterial colonies?
The 4 common characteristics that are used to describe bacterial colonies are shape, size, color and texture.
Bacterial colonies are basically group of bacteria which have originated from the same mother cell and have divided repeatedly. The morphological characteristics of a colony are basically the visual characteristics by which we can distinguish between different bacterial colonies.
The first most common characteristic is the shape. The shape includes form of the bacteria which can be circular, filamentous etc. and also margin which can be undulate, irregular etc. The second characteristic is the color which indicated whether the colony is transparent, opaque or pigmented. The third characteristic is size which can be large, medium, small or pinpoint. And finally there's texture or the surface appearance which means if the colony is smooth, rough, wrinkled, dull etc.
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Why are most point mutations harmless?
Most point mutations are harmless because the majority of the genetic code is non-coding, meaning that it does not contain instructions for making proteins.
Point mutations that occur in non-coding regions of the DNA will not affect the function of the proteins that are produced, and therefore, will not cause any harm.
Additionally, point mutations that occur in coding regions can sometimes result in a change in the amino acid sequence of a protein, but the change may not be significant enough to alter the protein's function. For example, a point mutation that changes one amino acid in a protein's sequence may not disrupt the protein's structure or function. This is known as a silent mutation.
Furthermore, some point mutations can even be beneficial by providing a selective advantage. For example, a point mutation that changes a codon for an amino acid to one that codes for a different amino acid but still allows the protein to function properly.
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Which of the following management practices attempts to minimize ecological impact by allowing some trees in a forest to grow to maturity
Getting unevenly aged stands through a selection process. Compared to even cutting, this uneven growth and trimming would boost biodiversity.
Tree stands that are uniform in age are all the same age. These trees are all of the same type and are planted at the same time. Therefore, setting up a biosphere reserve is the most efficient strategy to preserve a region's plant diversity. Ex-situ methods of conservation, such as seed banks, botanical gardens, and tissue culture, involve removing organisms from their natural habitat. By sucking carbon dioxide out of the atmosphere and storing it, forests aid in reducing the rate of climate change. Since the excess of carbon dioxide in the atmosphere is the main cause of climate change, this is a direct consequence.
The complete question is - Which management practices attempts to minimize ecological impact by allowing some trees in a forest to grow to maturity?
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Why is it important to distinguish true north from Geomagnetic north
True north is a fixed point on the globe. Magnetic north is quite different. Magnetic north is the direction that a compass needle points to as it aligns with the Earth's magnetic field. What is interesting is that the magnetic North Pole shifts and changes over time in response to changes in the Earth's magnetic core.
Many scientists claim that the synthesis of the first organic molecules from inorganic precursors was possible because of the highly reducing atmosphere found on primitive Earth. Which of the following is an appropriate null hypothesis that could be used when investigating the claim
An appropriate null hypothesis that might be used to test the claim is that the synthesis of organic molecules from inorganic molecules is conceivable both at the levels of atmospheric oxygen present today and on early Earth.
When investigating the possibility that life may have started on the planet, it is vital to take into account the concept that organic molecules can be created from inorganic ones both under conditions of current atmospheric oxygen levels and those present on primitive Earth.
In order to more thoroughly investigate the potential of life's genesis on Earth, this null hypothesis offers evidence that organic molecules can arise without the presence of life.
We can learn more about the many chemical processes and reactions used to create organic molecules by looking at them.
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What is an example of Mendelian trait that we find in humans?
Albinism and Huntington's disease are two instances of human autosomal Mendelian traits. Phenylketonuria is another example of a human mendelian trait: This illness is an illustration of a Mendelian trait since it is passed down from parents to children when both parents have heterozygous (Aa) and homozygous (Aa) circumstances.
Human characteristics known as Mendelian traits are those that are heavily influenced by Mendelian inheritance. Mendelian inheritance is the term used to describe how qualities that are regulated by a single gene with two alleles, one of which may be dominant to the other, are passed down from parent to child. Even though just a few human features are governed by a single gene with two alleles, they provide a solid foundation for learning about human heredity.
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How do glands of the endocrine system help your body maintain homeostasis?
What will the offspring look like if you crossed a tall pea plant TT with a short one TT )?
If you crossed a tall pea plant TT with a short one TT all the offspring will be tall.
Dominance is the phenomena in genetics where one allele (variant) of a gene on one copy of a chromosome obscures or overrides the impact of another allele (variant) of the same gene on the other copy of the chromosome. [1][2] Dominant refers to the first variant, and recessive to the second.
In both Mendelian inheritance and traditional genetics, dominance is a crucial idea.
No allele or its features are inherently dominant (phenotype). One allele of a given gene may be dominant over a second allele of the same gene, recessive to a third allele, and co-dominant with a fourth allele; the relationship between two alleles of a given gene of any function is strictly relative.
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Which of the following conclusions about the radiolabeled amino acid is best supported by the results of the experiment
It was largely integrated into proteins that control and oversee metabolic processes.
Amino acid molecules comprise proteins. Proteins and amino acids are the building blocks of life. After proteins have been digested or denatured, amino acids are still present. In order to maintain the body, the human body makes proteins from amino acids:
The body can produce energy from amino acids to digest food, grow, repair bodily tissue, and carry out a variety of other bodily functions.
Amino acids are divided into three groups:
Important amino acids
Unneeded amino acids
conditional amino acids
Amino acids are necessary for the synthesis of body protein as well as other essential nitrogen-containing compounds like creatine, peptide hormones, and certain neurotransmitters. Even though allowances are portrayed as meeting biological needs, amino acids.
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What are the chances of a calico being a boy?
Out of 3,000 calico cats born, only one is male. These cats are so rare that they are often referred to as feline "unicorns."
99.9% of calico cats are feminine. Two X chromosomes are required to produce a three-color (calico) coat, and an XX pair also makes the cat female. The calico fur pattern is mostly white, along with patches of two other colors. Also, since a cat's coat color is linked to her X chromosome in her cells, calico cats rarely become male. Male cells acquire only one X chromosome. That is, men usually have only one color.
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write a plan to investigate the effect of temperature on the rate of digestion of starch by the enzyme amylase
your plan should include:
•a hypothesis
•selection, and justification of equipment, techniques or standard procedures
•health and safety associated with the investigation
•a step-by-step method for data collection and analysis to test the hypothesis including:
-quantities to be measured
-number and range of measurements to be taken
- how equipment may be used
-control variables
-brief method for data collection analysis
(12 marks)
Here is a possible plan for investigating the effect of temperature on the rate of digestion of starch by the enzyme amylase:
Hypothesis: Increasing the temperature will increase the rate of digestion of starch by the enzyme amylase.
Equipment and techniques:
1. Microscope and microscope slides
2. Hot plate or incubator to control temperature
3. Stopwatch or timer
4. Starch solution
5. Amylase enzyme solution
6. Water bath to maintain temperature
Justification: The microscope and microscope slides will be used to observe the digestion of starch by amylase. The hot plate or incubator will be used to control the temperature of the reaction. The stopwatch or timer will be used to measure the time required for the starch to be digested. The starch solution and amylase enzyme solution will be used to carry out the reaction. The water bath will be used to maintain the temperature of the reaction.
Health and safety:
1. Wear protective goggles to protect the eyes from splashes
2. Handle the solutions and enzymes carefully to avoid spills or splashes
3. Follow proper laboratory safety guidelines, such as not eating or drinking in the lab
Step-by-step method for data collection and analysis:
1. Set up the microscope and prepare the microscope slides.
2. Prepare several starch solutions with different temperatures, using the hot plate or incubator to control the temperature.
3. Add a drop of amylase enzyme solution to each starch solution.
4. Place the slides under the microscope and start the timer.
5. Observe the digestion of the starch at regular intervals, using the stopwatch or timer to measure the time required for the starch to be digested.
5. Record the time required for the starch to be digested at each temperature.
6. Repeat the experiment several times to obtain a reliable average.
7. Plot the data on a graph, with temperature on the x-axis and time required for starch digestion on the y-axis.
8. Analyze the data to determine the effect of temperature on the rate of starch digestion.
Control variables:
1. The concentration of the starch solution should be kept constant.
2. The concentration of the amylase enzyme solution should be kept constant.
3. The pH of the solutions should be kept constant.
4. The volume of the solutions should be kept constant.
Brief method for data collection and analysis:
1. Collect data by observing the digestion of starch at different temperatures and recording the time required for the starch to be digested.
2. Plot the data on a graph and analyze the trend to determine the effect of temperature on the rate of starch digestion.
3. Compare the results with the hypothesis to determine whether the hypothesis is supported or not.
What type of expense are food clothing and medical expenses?
Answer:
These are variable expenses.
Explanation:
These are needs. They are necessary because one can't survive without them.
There are two types of blood vessels that connect to capillaries: venules and arterioles. Based on their names, what can you guess their role is in carrying blood
The vasculature is a network of blood arteries that connects the heart to all of the body's organs and tissues. Arteries and arterioles transport oxygen-rich blood and nutrients from the heart to the organs and tissues, while veins and venules return deoxygenated blood to the heart.
Blood vessels are circulatory system components that convey blood throughout the human body. These veins carry blood cells, nutrients, and oxygen to the body's tissues. They also remove trash and carbon dioxide from tissues. All of the body's tissues rely on the functioning of blood arteries to support life.
There are five types of blood vessels: arteries, which take blood out from the heart; arterioles; capillaries, which exchange water and chemicals between the blood and the tissues; venules; and veins, which bring blood back towards the heart from the capillaries.
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Full Question: There are two types of blood vessels that connect to capillaries: venules and arterioles. Based on their names, what can you guess their role is in carrying blood? Do they carry oxygenated or deoxygenated blood?
What kind of sex is prohibited in the Bible?
Sex outside of marriage is the kind of sex which is prohibited in the Bible and it is also considered as a sin.
Within Christian circles, it's assumed God only wants us to have sex if we are wedded. Sex outside of marriage is one of the clearest, irrefutable proscriptions in Christianity. If someone have sex outside of their marriage with someone else than it is considered as a great sin.
The Bible's origin is both mortal and godly — not just from God and not just from humans.That single author of Bible was believed to be Moses, the Hebrew prophet who led the Israelites out of prison in Egypt and guided them across the Red Sea toward the Promised Land.
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Plant seedlings were treated with a range of concentrations of coumarin, a small organic compound. After one week, seedling height was taken as a measure of plant growth. In a separate experiment, stem tissue sections were taken from newly germinated seedlings and incubated in solutions containing 14C-glucose and coumarin. After 24 hours, the quantity of radioactive label in cytoplasmic and cell wall fractions was measured. All data are shown in the table above. Which statement is supported by these results
Coumarin is found to restrict the production of a specific component found in the cell walls but not in the cytoplasm, which plays an important role in the growth of the stem. (BIOSYNTHESIS< CYTO< STEM GROWTH)
The results from the experiment suggest that coumarin treatment negatively impacts the growth of plant seedlings, as measured by seedling height. This indicates that coumarin has an inhibitory effect on stem growth.
Additionally, the experiment that measured the number of radioactive labels in cytoplasmic and cell wall fractions revealed that coumarin affects the biosynthesis of a specific component in the cell walls but not in the cytoplasm. This suggests that coumarin specifically targets the production of a component that is critical for stem growth, and that this component is found primarily in the cell walls and not in the cytoplasm.
This is further supported by the fact that the radioactive label is found in the cell wall but not in the cytoplasm, indicating that the biosynthesis of this component is taking place in the cell wall and not in the cytoplasm. Overall, these results suggest that coumarin is inhibiting the biosynthesis of a component that is critical for stem growth, specifically in the cell walls.
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If a neurosurgeon directly stimulated parts of your somatosensory cortex, which of the following would you most likely experience
If a neurosurgeon directly stimulates the somatosensory cortex, the most likely experience would be the sense of being touched.
Somatosensory cortex is the part of the brain involved in receiving and processing of the information received from the senses of the body like touch, pain, temperature, etc. The region of the brain where the cortex is present in the parietal lobe.
Senses are the specialized organs of the body that make the individual aware of its surroundings. These senses act as receptors that receive the information from an external stimuli. There are 5 types of senses in human body: touch, vision, hearing, smell and taste.
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Base your answer on the information below and on your knowledge of biology.
A student measured oxygen and carbon dioxide concentration levels in an aquatic ecosystem during a 24 hour period. Identify two biological processes that are responsible for the production of varying amounts of carbon dioxide and oxygen within the aquatic ecosystem.
Two biological processes responsible for producing varying amounts of carbon dioxide and oxygen within aquatic ecosystems are 1) respiration by aquatic plants and animals and 2) photosynthesis by aquatic plants.
What is an aquatic ecosystem?
An aquatic ecosystem is any freshwater or saltwater environment and the characteristic flora, fauna (plants) and animals (animals) that inhabit that habitat. Freshwater ecosystems include rivers, lakes, and ponds. Saltwater ecosystems include seas and oceans. Aquatic ecosystems have historically been important to humans and other organisms. Aquatic ecosystems not only provide a food source for a wide variety of organisms, but are also essential for cycling important gases and nutrients such as carbon dioxide, nitrogen and phosphorus.
Aquatic ecosystems are known to have high levels of biodiversity.
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I need someone to explain this answer
Answer:i just simple formulas just remember in bio emzymes live through cells and make up the cell there are millions of different enzymes
Explanation:
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Why are rapidly growing populations an issue?
A . They utilize resources faster then they can replenish
B. They overwhelm water purification plants.
C. They spread out over vast areas of land turning farms and habitat into housing.
D . All of the above .
Which is not part of a community infrastructure?
A. Public water supply
B. Arable land
C. Power plants
D. Sewer lines
In this century , the world population is likely to..
A. Stop growing
B. Begin to slowly decline
C. Continue to slowly grow
D. Continue to rapidly grow .
Which is not a strategy to reduce population size?
A. Public advertising
B. Economic incentives
C. Legal punishments
D. Limiting education for women
Researchers radio-tagged gray whales to understand the timing of their migration and details of their journey. What types of data were researchers able to collect about the gray whale migrations
Types of data were researchers able to collect about the gray whale migrations:
Migration begins when Arctic ice begins to form over the foraging grounds.Gray whales migrate to California's Baja Lagoon in December and January.On the way south, the female travels before the male.The northward migration begins after the plankton bloom and the peak of summer in the highlands.Most grays migrate to forage in the Arctic during the summer. Meanwhile, the winter migration originates in the waters off Baja California, Mexico where they feed the newborn calves. The annual round trip is taken by more than 10,000 million.
The gray whale (Eschrichtius robustus) frequently migrates in large flocks along the west coast of North America. With a width of between 13 – 16 meters, these pauses often live in calm and warm waters as a haven from predators.
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This chart presents data on greenhouse gas emissions caused by human activity from 1990 to 2012 .which question would help clarify this evidence
Increased demand for electricity and transportation have led to increased emission of greenhouse gases.
What are green house gases?Green house gases has been defined as those gases that are able to trap and re-radiate infrared radiation back to the earth thereby gradually causing a rise in the temperature of the earth. This phenomenon is known as global warming.
The chart from which the question should be answered is not shown but it must be known that as demand for electricity and transportation increased in the 20th and 21st century, the rate of emission of greenhouse gases increased likewise.
Therefore, Increased demand for electricity and transportation have led to increased emission of greenhouse gases.
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Which of the following is a feature that the stomach and the small intestine have in common?
Multiple Choice
a. Rugae
b. Circular folds
c. Three-layered muscularis
d. Mucus-secreting cells
e. Gastric pits
A feature that the stomach and the small intestine have in common is mucus secreting cells.
Which traits does the intestinal lumen possess?The three parts of the intestinal wall are the ileum, jejunum, and intestine. It aids with the further metabolism of foods that are stomach-born. In order for the body to use water, vitamins, minerals, carbohydrates, fats, and proteins, it absorbs them from meals. The tiny intestine is a part of the digestive system.
What is the function of the stomach?Digestion fluids are produced in our stomach to help in the breakdown of food. It stores food until it is ready to be discharged into our small intestine.
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Which species does Lucy belong to ?
One of the most well-known fossilised human ancestor species is known as "Lucy," thus the nickname.
A "funny bone narrative" could be used to describe Lucy's discovery. Johanson found the first piece of Lucy's skeleton at the area of her ulna closest to the elbow when you bump your ulnar nerve in your elbow, it presses against your humerus and gives you that tingly, "funny bone" feeling. Johanson was able to determine from Lucy's shattered ulna's size and shape that it definitely belonged to a primate and might very well be the fossilised remains of a hominin. When Johanson and Gray carefully searched the earth, they were happy to find a great deal more fossilised bone fragments, including pieces of a skull, mandible, ribs, pelvis, thighs, and feet.
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if a cell contained three pairs of homologoues (n=3, 2n=6) how many configurations are possible?
Twice the number of chromosomes in a haploid cell (n).
How many chromosomal combinations are feasible in the gametes of a 2n 6 cell?The number of potential chromosomal pairings in gametes is 2n (two to the ‘n’ power, where ‘n’ is the number of chromosomes in the haploid set). So, for 2n = 4, n = 2, and gamete number = 22 = 4, the answer is 4. Furthermore, for 2n = 6, n = 3, and gamete number = 23, the answer is 8.
As a result, an organism with cells 2n=6 is diploid and contains 6 chromosomes in total. In other words, this creature contains three chromosomal pairs. We will use the formula nCr = n! / r! * (n – r)! to compute combinations, where n represents the total number of things and r indicates the number of items picked at a time.
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What are the types of mutation and examples?
A mutation is a change in the DNA of an organism, virus, or extrachromosomal cell's nucleic acid sequence. DNA or RNA may be present in the viral genome.
Mutations may be caused by mistakes in DNA replication, viral replication, mitosis, meiosis, or other types of DNA damage (such as pyrimidine dimers from ultraviolet radiation exposure). Damaged DNA may then experience error-prone repair, notably microhomology mediated end joining, or it may result in a replication mistake or an error during another kind of repair (translation synthesis). Mutations can also be caused by the insertion or deletion of a DNA sequence due to mobile genetic elements.
A mutation may or may not have an impact on the phenotype the observable characteristics of an organism. The part that mutations play in both healthy and biological processes that cause disease, including as cancer, evolution, and the maturation of the immune system, including junctional diversity. Mutation is the source of all genetic variation, and it also serves as the rationale for the operation of evolutionary forces like natural selection.
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Reasons that the population size of an exotic species often grows rapidly when the species is introduced in a new environment include which of the following?
I. The exotic species is resistant to pesticides.
II. There is a large, underutilized food source in the new environment.
III. The exotic species has few natural predators in the new environment.
(A) I only
(B) II only
(C) I and III only
(D) II and III only
(E) I, II, and III
Reasons that the population size of an exotic species often grows rapidly when the species is introduced in a new environment include II) there is a large, underutilized food source in the new environment, III) the exotic species has few natural predators in the new environment. Hence, option D is correct.
The introduction of an exotic species into a new environment can often cause a rapid population growth due to several key factors.
One of these is that there tends to be a large, underutilized food source in the new environment which the exotic species can take advantage of. Another factor is that the exotic species may have few natural predators in the new environment, allowing them to thrive without fear of predation.
As a result, these two factors can lead to a rapid population growth of an exotic species when it is introduced into a new environment.
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what part of a comet points most directly away from the sun?
The tail of the comet always points away from the sun no matter what direction the comet travels. Because the solar wind always blows out from the sun!
How often do orcas need air?
Orcas can't even come close to holding their breath for as long. Their maximum duration is approximately 15 minutes, but we typically observe them surfacing for air every 3-5 minutes when traveling or every minute when moving quickly.
The orca, also known as the "killer whale," is the largest member of the dolphin family and is a whale with teeth. These large marine mammals are easy to spot due to their black-and-white coloring, large dorsal fin, and sleek body. On the fluke's undersides, ventral surface, and lower jaw, bright white is the predominant color. The distinctive patterns serve as a method of concealment when they are searching for food.
Whales, like humans, breathe in oxygen through their lungs. However, rather than breathing through their mouths, they breathe through their nostrils, which are the blowholes on top of their heads. They can easily breathe through the blowhole without lifting their entire head out of the water.
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