Which best summarizes the concept of natural selection?

Which statements explain the relationship between photosynthesis and cellular respiration?

Finger [1]

Answer:

photosynthesis removes carbon dioxide from the atmosphere, and cellular respiration puts it back. Photosynthesis releases oxygen into the atmosphere, and cellular respiration uses that oxygen to release energy from food

Explanation:

4 0

3 years ago

Both the heart and arteries contract to pump blood throughout the body. Please select the best answer from the choices provided.

rosijanka [135]

The heart and the arteries of a person, both contracts to pump the blood throughout the body. The aorta, which is the largest artery of the human body, pumps the blood from the heart to the entire body of a person. The oxygen-rich blood is pumped out of the left ventricle when its contraction into the aorta, from where it is transported to the whole body.

Hence, the given statement is true.

6 0

3 years ago

Read 2 more answers

Choose all the answers that apply.

arlik [135]

Answer:

Option A, B, and C are correct

Explanation:

Incomplete dominance means that the trait represented by two alleles expresses themselves equally thereby hindering dominance of any of the allele completely.

Now,

Let us assume the allele of red petals be represented by "R" and the allele of white petals be represented by "r"

The pink flowers will have genotype "Rr"

Now if two pink flowers are crossed, the following offsprings are produced

Rr X Rr

RR, Rr, Rr, rr

Let us evaluate all the options one by one

a) Ration of pink flower to red flower ( Rr:RR)

There are 2 pink (Rr) flower and 1 Red (RR) , thus the ration of pink flower to red flower is 2:1. Option A is correct

b) one out of four offspring is white in color, therefore the % of white flower is

$\frac{1}{4} * 100\\= 25\\$ %. Option B is correct

c) Two pairs RR and rr are homozygous, thus out of four offsprings two are homozygous. Therefore %of homozygous flowers will be

$\frac{2}{4} * 100\\= 50\\$ %. Option C is correct

d) There are two heterozygous offsprings i.e Rr, therefore the % of heterozygous is $\frac{2}{4} * 100\\= 50\\$ %. Option D is incorrect

e) half of the flowers are hybrid. Therefore option e is incorrect

Therefore, Option A, B, and C are correct

4 0

3 years ago

What would happen if there was an imbalance of certain enzymes in the body?

ivann1987 [24]

It would create emotional and physical changes in the organism’s body

5 0

3 years ago

An 85-year-old woman is administered a general anesthetic for repair of a hip fracture. Which of the following properties of the

fenix001 [56]

Answer: Solubility in lipids

Explanation:

All the volatile anaesthetic agents has dose dependent respiratory depression VT and MV which may be compensated by increased respiratory rate.

The respiratory depression is more common in case of older people as they cannot compensate for the volume of air.

The solubility of the anesthesia in the lipids can be a risk which can put 85 year old women into respiratory depression.

7 0

3 years ago