BIOLOGY HIGH SCHOOL

The oxygen content in the atmosphere of the early Earth is thought to have increased significantly once which of these developed?

Answers

Answer 1
Answer:

Oxygen content increased after photosynthetic algae developed.

The algae is able to use solar energy, water, and carbon dioxide to synthesize sugars for its own energy. During the process, oxygen is released as a byproduct.

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Which statement about stomata is true?A.)The number of stomata is greater on the upper surface of the leaf.

B.)The number of stomata is greater on the lower surface of the leaf.

C.)The number of stomata is equal on both surfaces of the leaf.

Answers

The answer is B. The number of stomata is more on the lower surface of the leaf. The primary function of the stomata is to regulate moisture loss from the plant. The upper surface of the leaf is more exposed to the air and sunshine thus water is more susceptible to evaporation. However, the stomata is abundant on the lower surface, the location of it helps the plants to conserve more water 

The __ is a tiny filtering unit in the kidney

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The nephron is the whole it. the smaller subunit is called a bowman capsule 

Which of these gametes contains one or more recombinant chromosomes?

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The male human has a sperm cell and the female has an egg cell. The cells from the male and female that combine to form a zygote are called gametes. The human sperm and egg cells each contain 23 chromosomes. . A combination of gametes forms a zygote with 46 chromosomes. The type of cell division that produces gametes with half the normal chromosome number is the meiosis. Meiosis is the type of cell division used in sexual reproduction. It will occur in the testes and ovaries.

The gametes B and C are the ones that contain one or more recombinant chromosomes, option 4 is correct.

Recombinant chromosomes are formed through the process of genetic recombination, where genetic material is exchanged between homologous chromosomes during meiosis. The exchange of genetic material results in new combinations of alleles on the chromosomes.

The B and C gametes are likely to contain recombinant chromosomes because they are a result of the crossing over and recombination that occurs during meiosis. Gamete B is likely to have undergone genetic recombination, as it carries a combination of alleles from both homologous chromosomes. Similarly, gamete C is also likely to contain recombinant chromosomes due to the recombination process.

The other options may not necessarily contain recombinant chromosomes, as they may have inherited intact, non-recombined chromosomes from the parent cells during meiosis, option A is correct.

To learn more about chromosomes follow the link:

brainly.com/question/30077641

#SPJ6

The correct question is:

Which of these gametes contains one or more recombinant chromosomes?

1. A and C

2. A and B

3. D and E

4. B and C

5. A and D

The process in which the nucleus of a eukaryotic cell devides during asexual reproduction is called

Answers

Answer:

Mitotic Phase 

Explanation:

During mitosis, the two sister chromatids that make up each chromosome separate from each other and move to opposite poles of the cell.

Why do phospholipids form a bilayer in water?

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Each phospholipid has a hydrophobic (dislikes water) tail, and a hydrophilic (likes water) head. So when added to water, the phospholipids from a ring.

Gametes, or reproductive cells, belong to which of the following categories?a. Diploid cells
b. Haploid cells
c. Neither diploid nor haploid cells
d. Either diploid or haploid cells depending on different situations

Answers

gametes or reproductive cells belong to haploid cause every of them has one half of chromosomes,23 pairs each , if they unite this is the time they are called diploid with complete traits and 46 chromosomes.
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