BIOLOGY HIGH SCHOOL

____ are the most highly concentrated source of energy in the body.A.fats
B. proteins
C. steroids
D. amino acids

Answers

Answer 1
Answer:

Fats are the most highly concentrated source of energy in the body, providing around 9 calories per gram. They are stored in the body for times of energy shortage, while proteins, carbohydrates, steroids, and amino acids have other primary functions.

The most highly concentrated source of energy in the body is fats. While all macronutrients - proteins, carbohydrates, and fats - provide energy, fats are the most energy-dense. They provide about 9 calories per gram, compared to 4 calories per gram for both proteins and carbohydrates. This is why fats are often stored in the body for times of energy shortage. Steroids and amino acids, while important for other functions in the body, aren't primary sources of energy.

Learn more about Energy here:

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Answer 2
Answer:

the answer is fats here you go

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The growth of most plants is limited by the amount of nitrogen available. Which of the following effects does low nitrogen availability most likely have on the carbon cycle?A More carbon dioxide is taken up by plants
B Carbon dioxide is trapped in the soil around plants
C Less carbon dioxide is removed from the atmosphere.
D Carbon dioxide is converted to carbonates by bacteria.

Answers

C. Less carbon dioxide is removed from the atmosphere.

The process of natural selection relies on variation within a population or species and occurs when - A. organisms that exhibit favorable adaptations increase in number compared to those less adapted, and therefor increase their chances of passing along favorable traits to future generations

B. asexual organisms are the result of the process of natural selection

C. organisms that have traits which are not helpful continue to reproduce and carry-on those traits

Answers

Answer:

A

Explanation:

by the definition of natural selection more fit organisms survive and reproduce more, propelling population change.

What is the density of the marble? A. 0.10 g/mL B. 240 g/mL C. 40 g/mL D. 1.875 g/mL

Answers

40 g/mL IS THE ANSWER

How does a compass needle respond when a compass is placed within a magnetic field?

Answers

Answer:

It point outs  the magnetic poles of the magnetic field by aligning itself

Explanation:

The needle of the compass is a small magnet with a north and south magnetic poles. Now when compass is placed in a magnetic field , its needle will try to align itself in a way such that magnetic poles of the needle points the respective opposite pole of the magnetic field.

Therefore , the alignment of magnetic needle of compass shows the following -

a) North of the magnetic needle of compass - shows the south pole of the magnetic field

b) South of the magnetic needle of compass - shows the North pole of the magnetic field

It aligns in a direction parallel to the field

What cells were chloroplast present in? What did they look like in the various cells? Be specific.

Answers

Chloroplasts are present only in plant cells. The chlorophyll found in the chloroplast is responsible for its green pigment and where phtotsynthesis takes place. They are oval in shape with outer and inner membranes. The inner membrane surrounds the stroma and grana.

Suppose a population is carrying a condition controlled by two alleles: P (dominant) and p (recessive). Only homozygous individuals that have two copies of the recessive allele have the condition. If the p allele is found in 15 percent of the population, what's the frequency of the PP genotype? A. 25.5 percent
B. 72.25 percent
C. 2.25 percent
D. 12.75 percent

Answers

The answer is B. 72.25 percent.

The Hardy-Weinberg principle can be used:

p² + 2pq + q² = 1 and p + q = 1

where p and q are the frequencies of the alleles, and p², q² and 2pq are the frequencies of the genotypes.

The p allele (q) is found in 15% of the population:
q = 15% = 15/100
Thus, q = 0.15

To calculate the P allele frequency (p), the formula p + q = 1 can be used:
If p + q = 1, then p = 1 - q
p = 1 - 0.15
Thus, p = 0.85

Knowing the frequency of the P allele (p), it is easy to determine the frequency of the PP genotype (p²):
p² = 0.85² = 0.7225

Expressed in percentage, p² = 72.25%.
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In humans, having freckles is the result of a dominant gene, and not having freckles is a recessive trait. If a freckled man who is homozygous for this trait has a child with a woman who does not have freckles, which of the following best describes how their child would most likely appear?A. Their child would not have freckles if the father passes on the recessive allele.B. Their child would have freckles.C. Their child would not have freckles.D. Their child would have freckles since the mother is a carrier for freckles.Can someone explain this for me ?