BIOLOGY HIGH SCHOOL

____ adds genetic variation, which is essential for evolution

Answers

Answer 1
Answer: The answer would be genes

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Which statement best describes the Richter scale?A. It's a numerical system that measures the smallest seismic waves during an earthquake.
B. It's a test given to all geologists.
C. It's named after a scientist who studied tornadoes.
D. It's a numerical rating system that measures the largest seismic waves during an earthquake.

Answers

The Richter scale is a way of giving the intensity of all earthquakes a numerical value. this allows the strengths of different earthquakes to be compared. Because of this, i think the best answer is D
Your answer would be D. It's a numerical rating system that measures the largest seismic waves during an earthquake .

If you have an 81 for your 9 weeks grade but make a 70 on your exam whats going to be your final grade?

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man you need to change this to a different catagory

A population of rabbits lives in a forest. The habitat features many small spaces for hiding. Over many generations, the average size of the rabbits gets smaller and smaller. What type of selection is this?

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Answer: Directional Selection

Explanation: Directional selection results in a covariance between the trait and fitness and can lead to changes in a trait in a population.
Natural Selection. The gene of small size has been favored and that is the gene that gets more dominant in the population over generations.

if you are able to eat 10.000.000 bananas at once what would happen to our bodies knowing that bananas contain a small amount of radiation?

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You would eventually die from the radiation
You would die because the radiation levels would disrupt brain waves causing heart failure, stroke, ect.

Why are women often carriers of X-linked traits but rarely affected by them?

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Women have two x chromosomes, compared to men who have one x and one y chromosome. Because of the two x chromosomes, one of them can override the other. In men they only have one x and one y, they don't have the extra x chromosome to override the allele.
Women have two X chromosomes.Recessive alleles on one X chromosome are often masked by dominant alleles on the other chromosome.Women will not be affected unless they receive two recessive alleles.

Water is considered a polar molecule because _____. it has partial positive and negative charges at each end
it expands when it freezes
it dissolves solutes

Answers

Answer: Option (a) is the correct answer.

Explanation:

A water molecule contains two hydrogen atoms and one oxygen atom. The chemical formula of water is H_(2)O.

Here, hydrogen is electropositive whereas oxygen atom is electronegative in nature. Hence, oxygen atom pulls electrons from hydrogen atom and as a result partial positive charge develops on hydrogen and partial negative charge develops on oxygen atom.

Therefore, molecule of water becomes polar in nature.

Thus, water is considered a polar molecule because it has partial positive and negative charges at each end.

Answer:

The answer is It has partial positive and negative charges at each end.

Explanation:

When a neutral molecule has a positive area at one end and a negative area at the other, it is a polar molecule. Water is a polar molecule, because there is an irregular distribution of electron density in it. This means that water has a negative partial charge near the oxygen atom and a positive partial charge near hydrogen atoms.
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