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Novosadov [1.4K]
3 years ago
15

Why do blood vessels and lymph vessels have valves?

Biology
1 answer:
OLEGan [10]3 years ago
3 0
Lymph vessels have one-way valves in order to prevent the back flow of lymphatic fluid. Blood vessels have valves in order to keep the blood flowing in one direction.
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Which of the following conditions characteristics atomospere 111
xz_007 [3.2K]
The condition is which characteristics of atmosphere III is nitrogen-rich and oxygen-poor. Nitrogen-rich is one of the condition in which the atmosphere III characterizes. The other is oxygen-poor, is one of the condition characterizes atmosphere III. Nitrogen-rich material mostly called green because they are greenish in color. Oxygen-poor means the blood enters the RA or Right atrium or the upper chamber of the heart.
3 0
3 years ago
Why are the cells produced by meiosis considered gametes?
4vir4ik [10]
<span>Gametogenesis is the process of forming gametes (by definition haploid, n) from diploid cells of the germ line. Spermatogenesis is the process of forming sperm cells by meiosis (in animals, by mitosis in plants) in specialized organs known as gonads (in males these are termed testes).</span>
8 0
3 years ago
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Why does DNA replication have such accuracy ?
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Because human DNA is so very long (with up to 80 million base pairs in a chromosome) it unzips at multiple places along its length so that the replication process is going on simultaneously and more accurately.
5 0
3 years ago
Which of the following is the correct haploid number of chromosomes in humman?
Dima020 [189]

Answer: 23 chromosomes

In humans, gametes are haploid cells that contain 23 chromosomes, each of which a one of a chromosome pair that exists in diplod cells. The number of chromosomes in a single set is represented as n, which is also called the haploid number. In humans, n = 23.

HOPE THIS HELPS

4 0
2 years ago
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Which organisms from the food chain could Neil classify as consumers
weeeeeb [17]

Answer:

B or C depending on if there is a fish on the food chain

(most likely C though)

Explanation:

consumers are things that eat other things

producers are things that make energy for themselves and they can survive off that energy (anything that does photosynthesis)

Algae does photosynthesis. so A and D is wrong

B and C could be the right answers depending on if a fish is shown.

any item above another item with a like drawn to it in a food web is a consumer

producers are at the very bottom of the food web.

6 0
2 years ago
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