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Flauer [41]
3 years ago
14

During the Carboniferous period, plants and animals grew very large due to high concentration of A. oxygen in the atmosphere. B.

nitrogen in the atmosphere. C. carbon dioxide in the oceans. D. argon in the oceans .
Biology
2 answers:
Alja [10]3 years ago
7 0

Answer:

Option A, oxygen in the atmosphere

Explanation:

The highest level of oxygen reached during this phase of the geological cycle of earth. The oxygen level in  Carboniferous  period accounted for 35%  as compared to 21% of oxygen in the atmosphere in present time.

Due to high oxygen content, the giant and wide varieties of terrestrial animal and plant species evolved. For example – size of insects and carwlies increased, plant became extremely giant, increase in number of tree ferns etc.

Aliun [14]3 years ago
4 0

Answer: A oxygen in the atmosphere

Explanation:

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Which group of hormones is responsible for the developments during puberty
zepelin [54]
Gonadotropin-releasing hormone, luteinizing hormone (LH for short) and follicle-stimulating hormone (FSH for short).

EXPLANATION

When your body reaches a certain age, your brain releases a special hormone that starts the changes of puberty. It's called gonadotropin-releasing hormone, or GnRH for short. When this hormone reaches the pituitary gland, it releases two more hormones into the bloodstream: the LH and FSH. Although boys and girls do have these hormones, it depends on their sexual orientation the way these hormones work.
5 0
3 years ago
What is not true regarding fenestrated capillaries?
dangina [55]

The question is incomplete. The complete question is as follows:

Which of the following is not true regarding fenestrated capillaries?

A) Fenestrated capillaries in endocrine organs allow hormones rapid entry into the blood.

B) Fenestrated capillaries in the small intestine receive nutrients from digested food.

C) Fenestrated capillaries are essential for filtration of blood plasma in the kidney.

D) Fenestrated capillaries form the blood-brain barrier.

Answer:

Fenestrated capillaries form the blood-brain barrier.

Explanation:

The fenesterated capillaries are small fine thin capillaries that helps in the exchange of substances. These capillaries are mainly found in the kidney, small intestine and glands.

The fenestrted capillaries allow the exchnage of hormone in the blood and in the kidney for the filtration. The nutrients can be easily exchanged by the capillaries present in the small intestine. The blood brain barrier function is not performed by the fenesterated capillaries. They allows the rapid exchange function and not as the barrier.

Thus, the correct answer is option (D).

8 0
3 years ago
Which is an example of the way matter cycles through he bodies of living things ?
Shkiper50 [21]

Answer;

A. People eating salmon

Explanation;

-All of the materials an organism takes in are returned to the ecosystem, while the organism lives or after it dies.The movement of matter through the living and nonliving parts of an ecosystem is a continuous process, a cycle.

-Matter in an ecosystem may change form, but it never leaves the ecosystem, so the matter is said to cycle through the ecosystem.

6 0
3 years ago
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What does the term “evolution” mean to you
kap26 [50]

Answer:

In biology, evolution is the change in the characteristics of a species over several generations and relies on the process of natural selection. The theory of evolution is based on the idea that all species? are related and gradually change over time.

Explanation:

7 0
2 years ago
Read 2 more answers
Which of the following is true of cells in batch culture? Cells never reach exponential growth rates. Metabolic wastes do not ac
Nataly [62]

Answer:

Option (3).

Explanation:

Batch culture may be defined as a type of culture which are refereed as stack and operated as influx of the reactant up to the maximum level. This technique is generally used to grow the micro organisms.

The cell mass do not decrease or increases as the cell divides in the batch culture. The new batch are added during the culturing process. The cell mass remains constant in batch culture.

Thus, the correct answer is option (3).

7 0
3 years ago
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