In which phase of meiosis does the chromosome number change from diploid to haploid?

Red blood cells,carrying dioxide(a waste product of cellular respiration) travel in the blood vessel to the lung; to get rid of

alexandr1967 [171]

Answer:

True.

Explanation:

Red blood cells or erythrocytes carry oxygen to the cells of the body so that they can have energy and function properly. This is not the only function of red blood cells. Also, they carry dioxide, which is a waste product that needs to be out of our body. Erythrocytes carry the dioxide to the lungs, specifically to the alveoli. In the alveoli due to the inhalation, oxygen enters our body traveling up to the lungs, specifically to the alveoli, where thanks to the thin wall of it as well as the one on the capillaries that are in contact with it, the dioxide enters the lungs to be expelled in the exhalation, and the oxygen is taken by the red blood cells to be used in the cellular respiration and generate energy to keep the vital functions of our body.

3 0

3 years ago

The students in Ms. Hill's science class we're investigating the properties of water. They placed a piece of celery in a beaker

Rom4ik [11]

The answer to this question would be D.

Capillary Action.

3 0

3 years ago

How does one-called organism grow ?

Alenkasestr [34]

Answer: Growing is capable to a certain living organism. Growth means getting larger in size, and for multi-cellular organisms this is done by making more cells. Plants have special tissues called meristems where growth occurs. Single celled organisms increase their numbers by dividing and making more cells like themselves.

Explanation:

7 0

3 years ago

Compare the ATP production process in photosynthesis with that of cellular respiration. Give at least one difference and one sim

lukranit [14]

1) Both involve electron transport chains.
2) Chemiomosis allows ATP synthase to produce ATP. 
3) Both take place at some point within an organelle (mit. = CR, chloroplast= photo.) 
4) Both utilize ATP for energy at some points. 
5) Both provide power for cellular activities. 
5 Differences 
1)Cellular respiration depends on oxygen as a substrate. 
2)Photosythesis utilizes 2 electron transport chains (not just 1). 
3)In Photo. , energy is provided by photons and not catabolic processes as in cell. resp. 
4)Photosynthesis involves the production of NADPH (CR involves NADH and FADH2) 
5)Photosynthesis involves CO2 and H20 as substrates (splitting h20 provides the electrons for the process).

4 0

4 years ago

In humans, dimples (D) are dominant over no dimples (d). Curly hair (A) is dominant over

jeyben [28]

Answer:

1. ddaa

2. DdAa

3. One from each parent

4. False

5. 0.25

6. 0.25

7. 0.25

8. 0.5

Explanation:

The remaining part of the question is

1. What is Jane's genotype?

2. What is Paul’s genotype?

3. Where did Jane get her gene for curly hair? From her mother or father?

4. True or False: Jane's mother was heterozygous for curly hair?

5. What fraction of Paul and Jane's children should have curly hair and dimples?

6. What fraction of their children would have straight hair and no dimples?

7. What fraction should have dimples but not curly hair?

8. What is the probability of getting any offspring with dimples

Solution

1. Genotype of Jane's mother -ddaa

2. Genotype of Paul (heterozygous for dimples and curly hair) – DdAa

3. One “a” gene from mother (whose genotype for hair was aa) and second “a”gene from father (whose genotype was Aa)

4. False. She was having straight hair

5. Offspring of Paul and Jane

DdAa (4), Ddaa (4), ddAa(4) and ddaa (4)

4 out of 16 offspring will have curly hair and dimples = 0.25

6. ddaa, 4/16 = 0.25

7. Ddaa , 4/16 = 0.25

8. Ddaa, DdAa, 8/16 = 0.5

6 0

3 years ago