Answer:
selection favored lighter skin
Explanation:
This delicate balancing act explains why the peoples that migrated to colder geographic zones with less sunlight developed lighter skin color. As people moved to areas farther from the equator with lower UV levels, natural selection favored lighter skin which allowed UV rays to penetrate and produce essential vitamin D.
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Explain the stages of ecological succession. Choose either Primary or Secondary succession and then explain the stages of ecological
succession.
A good essay will be 5-6 sentences and will include:
A) What kind of natural disaster caused the ecological succession
B) Types of plants found in each stage (ex: trees, shrubs, grasses, etc.)
Answer:
Label E
Label E
Explanation:
Label ELabel ELabel ELabel E
A researcher is studying the plants and animals in a particular biome. The observations include ferns, large woody vines, monkeys, sloths, and boa constrictors. In which biome is the researcher located?
Tropical Rain Forest is the biome that include ferns, large woody vines, monkeys, sloths, and boa constrictors.
What is Tropical Rain Forest?Tropical rainforests are the rainforests that occur in the regions of tropical rainforest climate where there is no dry season. Due to such type of climate, there is greater amount of biodiversity.
So we can conclude that Tropical Rain Forest is the biome that include ferns, large woody vines, monkeys, sloths, and boa constrictors.
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An organism must have provided all of the following to survive EXCEPT
Answer:
The answer is the one that is not on this list
List of criteria for a living organism:
1.) Can Reproduce
2.) Goes through homeostasis
3.) Needs Energy
4.) Is organized/ has cells
5.) Grows and Develops
6.) Responds to stimuli.
Explanation:
How Expotential and logistic growth model similar how are they different
Answer:
The exponential growth model shows a characteristic curve which is J-shaped while the logistic grown model shows a characteristic curve which is S-shaped. The exponential growth model is applicable to any population which doesn’t have a limit for growth. The logistic growth model is applicable to any population which comes to a carrying capacity.
Explanation:
What are the horticultural advantages of producing plants by cuttings rather than from seeds? Can you think of any disadvantages?
.Propagating a plant by cuttings will allow you to keep the special characteristics of that plant. Plants grown from seed will often be different from the parent plant and from each other. Propagating a new plant via cuttings avoids the difficulties of propagating by seed.
Disadvantages of propagating stem cuttings are: You will get a lack of genetic diversity and you may potentially increase Insect and Disease weakness in the new plant.
Fossil evidence indicates that some dinosaurs had feathers. If birds are indeed descended from dinosaurs, feathers are what kind of character?.
How would an increase in atp affect the rate of glycolysis?.
Answer:
The rate would slow down.
Explanation:
as ATP binds to the regulatory site, lowering phosphofructokinase activity.
What is the role of DNA?
a: to allow substances to enter the cell
b: to fight infections
c: to encode genetic information and control the cell
d: to release cytotoxins
Answer:
c
Explanation:
every thing related to dna is encoding or transcribing genetic info or genes
Answer:
To encode genetic information and control the cell
Explanation:
I GUESS
This plant cell was changed because...
(A) equal amounts of water moved across the cell wall
(B) the concentration of water is greater inside the cell than outside the cell
(C) more water left the cell than entered the cell
(D) the cytoplasm moves water into the nucleus
Answer:
The answer is D good luck
Which is NOT true about an animal life cycle?
O A) Most animals spend the majority of their life as diploid organisms
B) Fertilization occurs when a sperm and an egg fuse
C) The gametophyte stage is followed by the sporophyte stage
D) The zygote that forms develops into an embryo
PLEASE HELP MEEE!!!
(A simple answer would be great no links please and thank you)
An experiment is
testing how
different fertilizers
affect plant
growth. Which of
the following
would be the
CONTROL
GROUP in this
experiment?
A. the growth of the
plants
B. the fertilizers
C. multiple groups with
the same plant and
fertilizer
D. a plant without
fertilizers
Answer: B
Explanation:
A. the growth of the plants
Fertilizers provide essential nutrients to plants in form of soluble salt compounds, and directly affect plant growth. ... Excess fertilizer alters the soil by creating too high of a salt concentration, and this can hurt beneficial soil microorganisms.
If a strand of DNA has 48% cytosine what will the percent be for the other nitrogenous bases?
Answer:
There are 4 possible nucleotides that occur in two complementary sets. If 24% of the DNA is cytosin, the equal share has to be the complementary guanin. That makes 48% GC that leaves 52% AT, thus 26% are adenine and 26% thymine.
This calculation of course wouldn’t work if you were to look at only one DNA strand, where you’d end up with a vastly underdetermined mathematical system.
Explanation:
What structures in the human body carry out some of the same function as xylem and pholoem
Answer:
Veins arteries and capillaries
The structures in the human body that carry out some of the same function as xylem and phloem are veins, arteries, and capillaries.
What do you mean by Xylem and Phloem?Xylem and phloem are the vascular tissues that transport water, minerals, and food from the roots to the leaves and from the leaves to the roots respectively.
Xylem and phloem represent homology with the veins and arteries. Veins carry blood back towards your heart, while arteries carry blood away from your heart.
Capillaries are blood vessels that carry the oxygen and nutrients from the blood and transport them into the tissues and organs. It also requires the elimination of the waste products away from your tissues.
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A sequence of dna that codes for a specific, detectable product, such as a protein or rna is called a
Gene is a sequence of DNA that codes for a specific, detectable product, such as a protein.
What is a Gene?
This is defined as the basic physical and functional unit of heredity and occupy a fixed position on a chromosome.
It is also the sequence of DNA that codes for a specific, detectable product, such as a protein or RNA.
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A sequence of DNA that codes for a specific, detectable product, such as a protein or RNA is called a Gene.
What do you mean by RNA?RNA may be defined as a single-stranded molecule that has a shorter chain of nucleotides that carries genetic information that is translated by ribosomes into various proteins necessary for cellular processes.
Gene is the sequence or stretch of the DNA which carries genetic information. It is the nucleotide sequence that can synthesize functional proteins or enzymes.
Therefore, a sequence of DNA that codes for a specific, detectable product, such as a protein or RNA is called a Gene.
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How many times would Earth rotate on its axis during one revolution of the sun?
The Earth will perform 366.25 rotations per revolution about the Sun.
What is Revolution?This is defined as the motion around the Sun along its orbit which is common with planets such as the Earth.
The Earth rotates 366.25 times around the Sun and which is equivalent to a calendar year which is used for time keeping.
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Answer:
365 days (1 year)
Explanation:
Revolution takes 1 year (365 days) while a rotating takes 24 hours (1 day). Don't mix them up!!
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Picture 1 depicts convergent boundary.
Picture 2 depicts divergent boundary.
Picture 3 depicts transform boundary.
What is a Divergent boundary?
This occurs when two tectonic plates move away from each other while convergent boundary occurs when the plates collide with each other.
Transform boundary is a fault along a plate boundary where the motion is mostly horizontal.
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In a multicellular organism, it is cell-to-cell communication that allows the trillions of cells to coordinate activities, including during development and regeneration. The three stages of cellular communication include: reception, transduction, and response. This study determined the key steps of a cell communication pathway involved in salamander limb regeneration. After amputation of a front salamander limb, the severed axons retract within the stump and grow back along the nerve sheath. To elucidate the molecular mechanisms, the researchers set up a series of controlled experiments to determine the events in salamander limb regeneration. Drag the general cell communication steps of the regeneration experiment into the correct order.
The process of amputation will interfere with the ability of cells to communicate with each other.
What is cell to cell communication?The body of whole multicellular organisms have a lot of cells which are differentiated hence they perform diverse functions. The essence of cell differentiation is to allow different cells to perform different functions.
The question is incomplete hence we can not give here the process of cell regeneration. However, we know that the process of amputation will interfere with the ability of cells to communicate with each other.
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What type of reaction is represented by the following chemical equation? Explain your answer. 2Na + 2HCl → 2NaCl + H2 + heat
Answer:
This when the metal react with acid.
Explanation:
This is because the HCl is the chemical symbol for hydrochloric acid and Na is the symbol for sodium and when these 2react it forms
sodium chloride + hydrogen + heat
Which of the following is a type of water pollution caused by leaded gas, The production of some pesticides, and burning garbage? Algae
dioxins
mercury
pathogens
Answer:
Dioxins.
Explanation:
Dioxin is a type of water pollution caused by leaded gas, the production of some pesticides, and burning garbage.
What do you mean by Water pollution?Water pollution may be defined as any undesirable or contaminated substance presents in water bodies that definitely harms the life of aquatic organisms.
Dioxins are highly toxic to the environment as they are responsible for causing cancer, a threat to the immune system, etc.
They are persistent organic pollutants that take a long time in the degradation process which involves breakdown into simpler substances.
Therefore, Dioxin is a type of water pollution caused by leaded gas, the production of some pesticides, and burning garbage.
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Have you ever wondered how you hear sound? sound waves travel through your outer ear, where _________________ send the vibrations to the inner ear.
why was soil in wheat farms so much more vulnerable to erosion?
Explanation: The potential soil erosion increases if the soil has no or very little vegetative cover of plants/grass and/or crop residues. Plant and residue cover protects the soil from rain impact and splashes from it. It tends to slow down the movement of runoff water and allows excess surface water to infiltrate.
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One support of the behavioral perspective is that it is backed by strong and extensive research. please select the best answer from the choices provided t f
The statement one support of the behavioral perspective is that it is backed by strong and extensive research is definitely true.
What do you mean by Behavioral perspective?Behavioral perspective may be defined as the process of all acting throughout life as a result of some form of motivation or incentive.
The behavioral perspective always deals with the behavior of an individual with respect to any stimulus, which may be directly or indirectly associated with that individual.
Therefore, statement one support of the behavioral perspective is that it is backed by strong and extensive research is definitely true.
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Based on your observations, which part of the radish plant controls the
plant’s phototropism? Support your answer.
Answer:
you are asked to write your laboratory report right?
Explanation:
we need to see the laboratory experiment to answer this question. But according to my search, the answer may be the following:
Stems in these plants exhibit positive phototropism and grow in the direction of a light source. Photoreceptors in plant cells detect light, and plant hormones, such as auxins, are directed to the side of the stem that is furthermost from the light.
A ____________ uses direct elimination of acids, bases, or carbon dioxide from the body in order to adjust systemic acidity.
Answer:
Physiological Buffer
Explanation:
The three main types of food molecules are carbohydrates, proteins and fats.
a) For each of these substances, give three examples of foods and where you would find them.
b) State what each substance is used for in the body.
Propose an experiment to test the rate of meat digestion in animals with differing amounts of the enzyme pepsin in their digestive tracts. Be sure to include the independent and dependent variables, along with the specific procedure and materials to be used.
The experiment to test the rate of digestion of meat in animals with different amounts of the enzyme pepsin in their digestive tracts could be the test of true intestinal digestibility of meats used in diets for carnivores.
Digestibility of meatsProtein digestibility in pepsin supernatant is one of the most used enzymatic methods when evaluating the quality of protein of animal origin, being internationally recognized by the Association of Official Analytical Chemists.
With this information, we can conclude that the experiment to test the digestion rate of meats in animals with different amounts of the enzyme pepsin in their digestive tracts could be the test of the true intestinal digestibility of meats used in diets for carnivores.
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Which reaction would occur at the anode in a voltaic cell?.
Oxidation is the type of reaction which takes place at the anode in a voltaic cell.
What is Oxidation?
This is defined as a process in which an electron is removed from a molecule during a chemical reaction.
The anode is the negative electrode in a voltaic cell and is where oxidation reaction takes place.
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In the guinea pig, black coat (B) is dominant over white coat (b).
Answer:
what's the question
Explanation:
so I can give u a answer
Schwann cells are functionally similar to ________. Schwann cells are functionally similar to ________. oligodendrocytes astrocytes ependymal cells microglia
Answer:
Oligodendrocytes
Explanation:
Oligodendrocytes of the central nervous system
How is a cell like a system
Answer:
The metabolic activities in a cell such as respiration, and biochemical reactions are one of the major factors resulting in it being a system because all the organelles have a specific function.
Explanation:
hope this helps.