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spayn [35]
3 years ago
7

The first division of meiosis is called a reduction division. This is because

Biology
1 answer:
katen-ka-za [31]3 years ago
7 0

The correct answer is: the mother cell is diploid, but the products of the first division are haploid.

Meiosis is cell division with the purpose to produce the gametes: sperm and eggs. Meiosis is a two-step division process:

• meiosis I- Homologues pairs (chromosome pairs an organism receives from parents, one from mother, one from father) separate during this phase  

•  meiosis II – Separation of sister chromatids.

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If a hemoglobin molecule comes into close contact with a respiring cell, the presence of CO2 in the environment will cause hemog
lapo4ka [179]

Answer:

No, when the concentration of carbon dioxide is high, such as in peripheral tissues, CO2 binds to hemoglobin and the affinity for O2 decreases, causing it to release.

Explanation:

The O2 molecule is reversibly combined with the heme portion of the hemoglobin. When the partial pressure of O2 is high, as in the case of pulmonary capillaries, for example, the binding of O2 to hemoglobin and the release of carbon dioxide are favored, this is known as the Haldane effect. If, on the contrary, when the concentration of carbon dioxide is high, such as in peripheral tissues, CO2 is bound to hemoglobin and the affinity for O2 decreases, causing it to release, this is known as the effect Bohr.

8 0
3 years ago
Which chemical is LEAST persistent in
dalvyx [7]

Answer:

D. DDT

Explanation:

DDT is highly persistent in the environment means that it break down very slowly in the environment. The half-life for DDT is from 2 to 15 years. Half-life is the time needed for the degradation of half of the compound. Persistent bio-accumulative toxic substances (PBTs) are chemicals that break down slowly in the environment and its accumulation in living organisms are toxic. Some PBTs are dispersed through air currents while some uses other environmental pathways, resulting in contamination of regions far from their points of origin.

5 0
2 years ago
All the nerve processes radiating out beyond the brain and spinal cord, as well as all the neurons outside the brain and spinal
abruzzese [7]

All the nerve processes radiating out beyond the brain and spinal cord, as well as all the neurons outside the brain and spinal cord, constitute the peripheral nervous system.

Spinal cord is the backbone present in the vertebrates. It is essential for the correct posture and erect body. It extends from the end of the brain till the hipbone. The spinal cord consists of total 5 types of bones called vertebrae, that are total 33 in number.

Peripheral nervous system consists of parts of nervous system outside the brain and the spinal cord. It involves cranial and spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions.

To know more about peripheral nervous system, here

brainly.com/question/328696

#SPJ4

3 0
2 years ago
Justine was feeling very sick. She went to the doctor, who told her she had a bacterial infection and withdrew blood for blood w
marysya [2.9K]
I think the answer would be white blood cells because the white blood cells are trying to fight the bacteria off. That’s what I think. Hope this helped
4 0
3 years ago
Read 2 more answers
In pea plants, flowers are either white or purple; the purple color is produced by pigments called anthocyanins. The production
Hoochie [10]

Answer:

7/16

Explanation:

<em>The proportion of the offspring from the cross that will have white flowers is 7/16.</em>

The presence of anthocyanin which determines purple coloration is conditioned by the C_ and P_ alleles. It means that the absence of one or both of C and P will result in white flowers.

Two plants, each with CcPp are crossed:

CcPp   x   CcPp

Offpring

1 CCPP - purple

2 CCPp - purple

2 CcPP - purple

4 CcPp - purple

2 Ccpp - white

1 CCpp - white

1 ccPP -  white

2 ccPp - white

1 ccpp -  white

Proportion of offspring with white flowers = 7/16

Proportion of offspring with purple flower = 9/16

<em>See the attached image for the Punnet's square analysis of the cross.</em>

6 0
3 years ago
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