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Vlad1618 [11]
3 years ago
13

What is the advantage of having valves in the veins?

Biology
2 answers:
iogann1982 [59]3 years ago
7 0

Answer: Why do veins have valves and what is their function? These valves are what ensure blood flows toward your heart. Vein valves work hard, against gravity, to bring the blood that flowed down via arteries back up to your heart.

Explanation: thats the answer i hope this helps you :)

enot [183]3 years ago
5 0

Answer: ensure blood flows toward your heart

Explanation:

These valves are what ensure blood flows toward your heart. Vein valves work hard, against gravity, to bring the blood that flowed down via arteries back up to your heart. When your vein valves are open and healthy, they are able to do their job properly, as the blood is easily able to flow up.

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________ is a process that creates genetic variety in cells. (2 points)
Zigmanuir [339]

Answer:

B

Explanation:

I believe it is meiosis because there are two parts in which it helps to increase genetic variety. In prophase 1, the genes cross over, which increases the variety. Also, the chromosomes are assigned randomly in Metaphase 1.

Hope this helps:)

4 0
3 years ago
Read 2 more answers
Why is fishing for some kinds of ocean fish controlled by laws?
lora16 [44]
C is the answer. Due to the current state of the world economy; people, if left to their own devices, would fish as much as possible so they can sell their fish to make money. Current technology means we can catch as many fish as we want (trawlers etc.). The problem with this is that there is only a finite amount of fish in the sea. If we were to fish them without limits in place, we could cause them to go extinct.
8 0
3 years ago
A scientist designed an experiment to test the effect of temperature on bacterial growth. He grew three different cultures of th
ZanzabumX [31]

A scientist designed an experiment to test the effect of temperature on bacterial growth. The independent variable in this experiment was temperature.

<h3>What is the bacterial growth?</h3>

The outcomes display that microbes have a better increase price at 20, 25 and 30°C and 30°C than at 3°C. In general, an boom in temperature will boom enzyme pastime. But if temperatures get too excessive, enzyme pastime will reduce, and the protein (the enzyme) will denature.

General, the better the temperature, the greater without problems microorganisms can develop as much as a sure point. Very excessive and coffee temperatures each impede the enzyme strategies microorganisms rely on to survive.

Read more about the bacterium :

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5 0
2 years ago
Which stage is the last stage of speciation? Question 5 options: The populations become adapted to different environments and ev
kvv77 [185]

The stage is the last stage of speciation The populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring.

Speciation is split into 3 stages:

a) Separation.

b) Adaptation.

c) Reproductive Isolation.

Stage 1 Separation

  • A part of the populace separates and adapts to a brand new environment. Natural occasions along with tsunamis, tidal waves can reason organisms to split from their preliminary habitat to a brand new environment.

Stage 2: Adaptation.

  • At this stage, the organisms evolve new trends that permit them to a brand new environment. They own sure traits that permit them to match into the brand new environment. Example The notable white skin's color makes it tough for it to be visible withinside the dark.

Stage 3: Reproductive Isolation.

  • At this stage, organisms of the equal species reunite and do now no longer interbreed. e, species are remoted into new ones in order that they have the great diversifications for or her new habitat.

<h3>What is speciation?</h3>

Speciation is an evolutionary method where the new species arises from previous ones.

Hence concluded that speciation involves the stage where the populations become adapted to different environments and eventually become so different that they cannot interbreed to produce fertile offspring.

To learn more about speciation  refer to the link :

brainly.com/question/1963978

5 0
3 years ago
For both groups of plants, what BEST describes the relationship between light intensity and rate of photosynthesis?
lozanna [386]

Answer:

a

Explanation:

the rate of photosynthesis increases with light intensity

6 0
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