Answer:
Diploid sporophyte cells undergo meiosis to produce haploid spores. Each spore goes through mitotic divisions to yield a multicellular, haploid gametophyte. Mitotic divisions within the gametophyte are required to produce the gametes. The diploid sporophyte results from the fusion of two gametes.
What is desertification?
Question 4 options:
Formation of a desert.
Process of fertile land becoming unproductive in nearly dry areas.
Mass movement of sand dunes.
Areas of heavy rain, covered with sand.
Process of fertile land becoming unproductive in nearly dry areas.
Explanation:Desertification occurs when fertile land becomes arid.
What is Desertification
As the answer choice says, desertification is when fertile land becomes unproductive. The land that was once fertile then becomes a desert as vegetation can no longer grow. This means that the ground becomes very dry and almost sand-like, hence the name desertification.
Desertification is considered a form of soil degradation. This means that desertification happens when the soil becomes too dry or loses too many nutrients. There are multiple causes for this.
Causes of Desertification
A leading cause of desertification is drought. If land does not get enough rain, then it will dry out and become arid. Carbon emissions and global warming have decreased global rainfall and thus increased the rate of desertification across the world.
Overfarming is also a big cause of desertification. Fertile soil has limited nutrients, which are used by plants that grow in the soil. Usually, the soil has enough time to replenish the nutrients before more plants are grown. However, due to overfarming in some areas, the soil's nutrients are used faster than they can replenish. This causes the soil to lose its fertility and leads to desertification.
As the human population increases, stressors are being placed on the environment. Which of the following is one consequence of this growth?
increases in availability of freshwater
increases in renewable energy technology
decreases in conservation effort initiatives
decreases in availability of natural resources
As the human population increases, stressors are being placed on the environment. Decreases in availability of natural resources is one consequence of this growth.
Population- A population is the total number all organisms belonging to the identical species that really are present in a given location at the same time and have the potential to interbreed. Individuals need to be able which can mate with other members of a population and give birth to viable children for interbreeding to take place.
Natural Resources- Without human assistance, natural resources are present on planet. We can get water, wood, food, and energy from natural resources. Without natural resources, life is not conceivable. Oil, coal, natural gas, metals, stone, and sand are examples of natural resources.
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how does diffusion help a cell maintain homeostasis? responses:
A. it helps the cell expel excess waste.
B. it lets the cell know when it needs to produce more energy.
C. it helps the cell obtain and break down food for energy.
D. it helps maintain an equilibrium of particles inside and outside a cell.
Answer:
Explanation: Took the test
Diffusion is the movement of molecules through a semipermeable barrier from a higher concentration to a lower concentration. Therefore, option (D) is correct.
What is homeostasis?The term "homeostasis," which derives from the Greek words for "same" and "steady," refers to any method that living things employ to actively preserve the relatively stable conditions required for survival. Walter Cannon, a doctor, first used the term in 1930.
Fluids and electrolytes, energy and nutrition, and immune response mediators are three factors that affect homeostasis. For example, t Cell injury causes changes in the sodium-potassium pump, which disrupts fluid and electrolyte homeostasis, and surgery causes changes in functional extracellular fluid.
Hence, diffusion can help maintain the homeostasis in body.
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Continued evidence supports lifestyle management techniques to improve blood glucose control. Directly aligning with the dietary guidelines, individuals with diabetes are encouraged to?.
Individuals with diabetes are encouraged to take note more importantly than the quantity of macronutrients, the quality of the dietary fats and carbs consumed.
It has been shown that diets high in whole grains, fruits, vegetables, legumes, nuts, moderate alcohol consumption, and low in refined grains, red/processed meats, and sugar-sweetened beverages improve glycemic control and blood lipids in diabetic patients while lowering the risk of developing the disease. Diabetic patients' blood glucose levels can be improved by dietary factors like a favorable energy balance and excessive adiposity, dietary fat quality and amount, carbohydrate quality and quantity, vitamin and mineral intake, and individual and group foods.
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Explain how the shape of incisors helps them to carry out their function?
Answer:
Your eight incisor teeth are located in the front part of your mouth. You have four of them in your upper jaw and four in your lower jaw.
Incisors are shaped like small chisels. They have sharp edges that help you bite into food. Whenever you sink your teeth into something, such as an apple, you use your incisor teeth.
Incisors are usually the first set of teeth to erupt, appearing at about 6 months old. The adult set grows in between the ages of 6 and 8.
Answer:
Incisors have a tiny chisel-like form. They feature pointed edges that make it easier to bite into food. You use your incisor teeth whenever you bite down on anything, like an apple.
Suppose that you are a scientist and you have been given a sample of unknown cells by looking at the cells under a microscope what would you be able to determine about the cells came from? explain your reasoning
If I were to look at the sample of the unknown cells under a microscope, I would be able to determine if the cells came from a plant or an animal by checking if the cells have a cell wall or not.
What is a cell?A cell is the smallest unit of life that is able to remain functional and live independently. A cell consists of a cytoplasm surrounded by a membrane. The cytoplasm contains various organelles that support life such as the nucleus, mitochondria and Golgi apparatus.
If one were to view a sample of unknown cells under a microscope, the best way to determine where it came from is to check if it has a cell wall or not. Cells with a cell wall are plant cells, and cells without a cell wall are animal cells.
The cell wall is a rigid structure found outside the cell membrane that provides additional chemical and mechanical protection for the cell. Animal cells have no cell walls, hence, are more flexible and take various shapes if viewed under a microscope.
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Which of the following describes the BEST method for keeping the endocrine system healthy?
A.
exercise regularly
B.
eat a healthy and balance diet
C.
manage stress
D.
all of the above
Please select the best answer from the choices provided.
A
B
C
D
Answer:
the answer is D
Explanation:
Took the quiz
what is the role of the nervous system in digestion?(1 point) responses to provide oxygen to provide oxygen to provide enzymes to provide enzymes to provide electrical signals to initiate peristalsis to provide electrical signals to initiate peristalsis to provide passage of nutrients throughout the body to provide passage of nutrients throughout the body
The role of the nervous system in digestion is to provide electrical signals to initiate peristalsis.
What is peristalsis?Peristalsis is a radially symmetrical contraction and relaxation of muscles that travels anterogradely, like a wave down a tube. Peristalsis is a coordinated progression of involuntary circular muscles that contract and relax at the same time in the gut lining. Peristalsis is preceded by a simultaneous contraction of the longitudinal muscle and relaxation of the circular muscle.
Most of the smooth muscle tissue in a digestive tract, like the human gastrointestinal tract, contracts sequentially to create a peristaltic wave, which propels a ball of food (called a bolus before being converted into chyme in the stomach) along the tract. The chewed material is moved by relaxing the circular smooth muscles, contracting them behind it to prevent it from moving backward, and then pushing it forward with the longitudinal smooth muscles.
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NEED HELP IM BEING TIMED
Answer:C
Explanation:
Answer:
C
Explanation:
in step 3, he should've divide by -7 to find the value of x
What systems or system is responsible for the tingling in our foot?
what is the scientific term for rocks formed from lava?
Answer:
Extrusive
Explanation:
Hope this helps
Answer: Igneous rocks
the cell cycle is a repeating sequence of events that leads to the duplication and division of a cell. place the stages of the cell cycle in the order of their occurrence, from the earliest stage of cell growth through the latest stage of cell division. you are currently in a ranking module. turn off browse mode or quick nav, tab to move, space or enter to pick up, tab to move items between bins, arrow keys to change the order of items, space or enter to drop. earliest latest
The stages of cell cycle from the earliest to latest stage are
G1 [Gap1] phaseS [synthesis] phaseG2 [Gap2] phaseMitotic phaseCell cycle are the series of events that involve cell growth and cell division by mitosis. A cell divides to produce two new daughter cells
The cycle is divided into two main phases; the interphase consisting of the G1, S AND G2 phases and the divison [mitotic] phase
In some cases, there may be addition of the [tex]G_{0}[/tex] phase for cells that does not usually divide
The cycle starts all over again with the newly produced cells except for cells that enters the [tex]G_{0}[/tex] phase
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Which two organelles are most responsible for producing insulin in the pancreas?
Answer:The Endoplasmic Reticulum or the ER, and Ribosomes.
Explanation:
what is an expt in w/c extraneous variables have been controlled
Extraneous variables can threaten the internal validity of your study by providing alternative explanations for your results. In an experiment, you manipulate an independent variable to study its effects on a dependent variable.
When extraneous variables are uncontrolled, it’s hard to determine the exact effects of the independent variable on the dependent variable, because the effects of extraneous variables may mask them.
Controlling extraneous variables is an important aspect of experimental design. When you control an extraneous variable, you turn it into a control variable. Uncontrolled extraneous variables can also make it seem as though there is a true effect of the independent variable in an experiment when there’s actually none.
What is extraneous variables?
Any variable that you are not exploring in an experiment but that could potentially have an impact on the results of your research study is referred to as an extraneous variable.
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How many strong hurricanes were there a few decades ago
what is the genotype if the male animal
blackburn's lab altered the sequence of the telomerase rna. predict what might happen to telomeres in tetrahymena cells if the tetrahymena template rna were mutated to 3'-accccgac-5'.
The telomeres sequence would altered to 5-GGGCTG-3 if the tetrahymena template rna were mutated to 3'-accccgac-5'.
The biological underpinning for limitless proliferative capacity is nearly always provided by telomerase, an RNA-dependent DNA polymerase that creates telomeric DNA sequences. The chromosomal termini of vertebrates are extended with lengthy, repeating lengths of the straightforward telomeric DNA sequence [TTAGGG]n by the specialized DNA polymerase known as telomerase. DNA replication is hampered by the ends. Because one of the two new DNA strands at a replication fork is continuously made and is referred to as the leading strand, the DNA at the very end of the chromosome cannot be fully copied in each round of replication. This results in a slow, gradual shortening of the chromosome. Each Okazaki fragment starts with its own RNA primer, and the other strand is created in a large number of little pieces. The second strand, also known as the lagging strand, is formed in several tiny fragments known as Okazaki fragments, each of which starts with a unique RNA primer.
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) protein kinases are enzymes that catalyze phosphorylation of target proteins at specific sites, whereas protein phosphatases catalyze removal of phosphate(s) from phosphorylated proteins. phosphorylation and dephosphorylation can function as an on-off switch for a protein's activity, most likely through
Phosphorylation and phosphorylation can function as an on-off switch for a protein's activity, most likely through the change in a protein's charge leading to a conformational change.
A molecular switch is created by the activities of phosphorylation and dephosphorylation. In contrast, when proto-oncogene tyrosine-protein kinase (c-Src) is dephosphorylated, it is turned off, preventing the regulation of cell growth. For example, protein kinase B is only activated by following wing phosphorylation of its Ser and Thr residues.
One of the first processes necessary for the coordination of cellular and organic functions, including the control of metabolism, proliferation, apoptosis, subcellular trafficking, inflammation, and other significant physiological processes, is protein phosphorylation.
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Complete question is: Protein kinases are enzymes that catalyze phosphorylation of target proteins at specific sites, whereas protein phosphatases catalyze removal of phosphate(s) from phosphorylated proteins. Phosphorylation and dephosphorylation can function as an on-off switch for a protein's activity, most likely through
Protein kinases are enzymes that catalyze phosphorylation of target proteins at specific sites, whereas protein phosphatases catalyze removal of phosphate(s) from phosphorylated proteins. Phosphorylation and dephosphorylation can function as an on-off switch for a protein's activity, most likely through?
2. Define the following terms and give two examples of each.
Monosaccharide-
Disaccharide-
Polysaccharide
The following terms and give two examples of each:
Monosaccharide- Glucose, and fructose.
Disaccharide- Sucrose, lactose.
Polysaccharide- Starch and hyaluronic acid.
Monosaccharides are carbohydrates made up of one sugar unit. Common examples of monosaccharides or monosaccharides are glucose and fructose. These two monosaccharides are called hexoses because they have six carbon atoms. The three main monosaccharides we consume are fructose galactose and glucose.
A disaccharide is a sugar formed when two monosaccharide monosaccharides are joined by a glycosidic bond. Like monosaccharides, disaccharides are water-soluble. Three common examples are sucrose lactose and maltose. Disaccharides are important sources of energy in the diet and are usually considered the three main compounds sucrose lactose, and maltose.
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Most of the food produced in
industrial agriculture is
A. eaten by the farmers
B. eaten by the workers
C. sold for a profit
D. unable to be eaten
Answer: c
Explanation:
capitalism
Which word correctly fills in the blanks below?
Single-celled and many multi-celled organisms reproduce asexually by a process called _____________, which is simple cell division. In ___________, DNA is duplicated and then divided equally between two daughter cells. In ___________ in eukaryotes, the DNA is sorted into the two new nuclei formed. A separate process divides the cytoplasm in two. __________ keeps the number of chromosomes constant from one cell generation to the next.
Group of answer choices
mitosis
photosynthesis
budding
cellular respiration
Answer:
mitosis
Explanation:
Answer: a. budding
b. mitosis
c. budding
d. mitosis
Explanation:
Kate and Sam are using a scanning electron microscope to study photosynthesis in algae. Which is the benefit of this type of microscope compared to a light microscope?
Scanning electron microscope is better than light microscope to study photosynthesis in algae.
The light microscope is an instrument for visualizing great detail of an object. It does this by way of developing a magnified image via the use of a sequence of glass lenses, which first attention a beam of light onto or via an object, and convex lenses to increase the picture fashioned.
Light microscopy is used to make small structures and samples seen by way of supplying a magnified photo of the way they interact with visible light, e.g., their absorption, reflection and scattering.
Lenses form the picture goal lens gathers light from the specimen eyepiece transmits and magnifies the photo from the goal lens for your eye nosepiece rotating mount that holds many objective lenses tube holds the eyepiece on the proper distance from the goal lens and blocks out stray light.
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In eukaryotic organisms, genes usually consist of two alleles. The two alleles are often on different parts of the same chromosome.
These sentences contain incorrect information. Which option describes the mistake?
A: In eukaryotic organisms, the two alleles of the gene are on different chromosomes.
b: In eukaryotic organisms, genes are usually spread over four or more chromosomes.
c: In eukaryotic organisms, genes usually consist of a single allele.
, ,
d: In eukaryotic organisms, the two alleles of the gene are joined end to end on the same chromosome.
Answer:
[tex]\huge\underline\mathrm\purple{ANSWER}[/tex]
Because prokaryotes only have one chromosome, so they generally only have one allele for a particular gene. Many eukaryotes have 2 sets of chromosomes and thus 2 alleles of each gene, which may be the same or different.
ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ᴜʜ✌️
The growing of food is central to which type of society?
OA. An agrarian society
OB. A great society
OC. A functional society
OD. An industrial society
In an agrarian society, the growing of food may represent a central tissue and its economic growth largely depends on the primary matters (Option A).
What is an agrarian society?An agrarian society is based on the use of land to produce crops that may produce an excedent in order to generate richness, which is associated with a kind of economy that depends on primary products, i.e., plant crops. The progress of this society is based on the yields that are expected to produce benefits.
Therefore, we can conclude that agrarian societies are endurable when crop development and agriculture are sustainable (Option A).
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Usage of synthetic hormones for the modification of plants growth have bay environmental implications
The hormones respond to increased sunlight competition by stimulating increased stem elongation. Increased competition may cause plants to devote more energy to growing stem elongation than expanding leaf area.
Fluctuations in nutrient availability drought heat or cold high salinity or pathogen pest attack. Plant growth regulators are substances that, when added in small amounts, alter plant growth, usually by stimulating or inhibiting some part of the natural growth regulation system.
Plant hormones are regulators of nearly all aspects of plant development and the plant's response to its environment. Many plant hormones are active at very low concentrations and have strict spatial regulation of synthesis and response. They play important roles in the interactions between plants and beneficial microorganisms.
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most climax communities are mature forests. what features of mature forest species, such as oak trees, make him, able to dominate and compete in the ecosystem
They are tall and big are the features of mature forest species, such as oak trees, that make him, able to dominate and compete in the ecosystem.
What is ecosystem?An ecosystem is made up of all living things and their physical environment (or ecological system). These biotic and abiotic components are linked through nutrition cycles and energy exchanges. Photosynthesis takes place. Animals are essential for the movement of matter and energy because they eat both plants and other animals for nourishment. They have an effect on the biomass levels of both plants and microbes. Decomposers are creatures that decompose dead organic matter, releasing carbon into the atmosphere and promoting nutrient cycling by converting nutrients stored in decomposing biomass into forms that are readily used by plants and microbes.
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Due to differences in mating times, two sub-populations of frogs form into separate species, even though they occupy the same pond. This overall process is known as ________.
Due to differences in mating times, two sub-populations of frogs form into separate species, even though they occupy the same pond. This overall process is known as sympatric speciation.
What is sympatric speciation?Sympatric speciation refers to the divergence of individuals in a species to produce two or more different species in the same geographic location. Generally, sympatric speciation is due to the emergence of reproductive barriers between individuals in the same population.
Therefore, we can conclude that sympatric speciation may lead to the use of the same habitat by two different but evolutionary-related species.
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Examine the data for August 13 at midnight (roughly 00:00:00). What happens to the
water temperature as you go deeper into the lake?
The water at the bottom of deep lakes can grow cold without turning to ice due to the pressure. The water deep within the lake is pressured downward by the gravitational weight of all the water that is located higher above.
How does the temperature change as you go further into the lake?
The water at the bottom of deep lakes can grow cold without turning to ice due to the pressure. The water deep within the lake is pressured downward by the gravitational weight of all the water that is located higher above.The pressure permits the water near the lake's bottom to get chilly without rising and expanding.Warm water is less dense than cold water.Since salty, cold ocean water descends to the bottom of ocean basins beneath the less dense, warmer water above the surface, the temperature of the water decreases with depthThe deeper you go, the warmer the lake becomes.The upper layers of the lake warm up more in the summer than the lower ones.When swimming in a lake in the summer, you've surely observed that while your feet are frigid, your shoulders feel like they're in a warm bath.Warm water floats on top of the lake's surface because it is less dense than colder water. Ocean depth leads to a reduction in temperature.At the deeper depths, there are no seasonal variations.At the sea's surface, the temperature ranges from 30 °C (86 °F) to 1 °C (30.2 °F) at the seabed. As you are probably aware, water can heat up or cool down more slowly than air.Ice starts to develop when water cools to zero degrees Celsius (0°C), and it floats on top of warmer water, which is normally four degrees Celsius near the bottom of a lake or river (if it is not frozen). The pressure of the water pressing down on you increases as you go more beneath the surface of the ocean.The pressure rises by one atmosphere for every 33 feet (10.06 meters) you descend. The lower water quickly combines with the heat that the ocean absorbs.The heat is dispersed by the mixing.The water at the surface is kept warmer at night because it is combined with the warmer water underneath while the land rapidly cools. The rate at which the Earth's temperature rises with depth is known as the geothermal gradient.It suggests that the Earth's surface is receiving heat from the planet's warm center.For every kilometer of depth, the temperature rises by about 25°C on average.
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Question 9
Which is a model of feeding relationships?
OA) protein building
OB) food map
OC) food web
OD) sugar molecules
Answer:
protein building
Explanation:
Because it helps the body alot for healthy growth
4) The human body stores fats as
Adipose (fat) cells are specialized for the storage of energy in the form of triglycerides, but research in the last few decades has shown that fat cells also play a critical role in sensing and responding to changes in systemic energy balance.