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tiny-mole [99]
3 years ago
11

Which of the following prevents blood from flowing backward through the circulatory system?

Biology
1 answer:
netineya [11]3 years ago
6 0

Answer: Valves in the veins

Explanation: The flow of the blood inside the body takes place through the veins and arteries. The oxygenated blood from the heart is supplied to the different parts of the body.

The blood flows from the capillaries to the venules and from there to the veins. The blood moves in the veins by the rhythmic movement of the smooth muscles in the body.

Most of the blood moves against the gravity so there is a chance that it can backflow so to prevent this there are valves in the veins known as one way valves.

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Any process used to ask and answer testable questions about observations of the natural world defines which term?
N76 [4]

Answer:

scientific inquiry

Explanation:

8 0
3 years ago
Elephants are not the most common species in African grasslands. The grasslands contain scattered woody plants, but they are kep
lapo4ka [179]

Answer:

The elephants are the keystone species in this ecosystem.

Explanation:

The elephants' job is to knock down trees from time to time to get food from tall stock. This prevents the trees from overpopulating and allows shrub lands to stay in place. This is important as herbivores can continue to graze in large herds and carnivores can continue using the same hunting strategies with little to no push backs by trees.

This makes to elephants a keystone species as without them, the foundation species will decrease in population and create a whole different ecosystem with the trees as the new foundation species.

4 0
3 years ago
What kind of organism is an autotroph
ElenaW [278]

Plants.

This is because they can produce their own food with light. They use the sunlight to produce food, water, carbon dioxide or other chemicals they need. They process is call Photosynthesis.

Hope this helped :)

Have a great day

4 0
3 years ago
When growing cultures, the agar is ________ to separate pathogenic colonies of organisms from colonies of normal flora.
Anettt [7]

When growing cultures, the agar is<u> inoculated</u> to separate pathogenic colonies of organisms from colonies of normal flora.

Agar is the medium that is used for growing natural, common flora of microorganisms as the majority of the microorganisms can sustain in the agar medium.

If we want to determine a separate pathogenic colony of organisms in an agar medium then we need to inoculate the agar growth medium so that the pathogenic organism is separated from the normal flora of the microorganism. This technique allows us to filter out the cells that have the pathogenic microorganism in it.

To learn more about normal flora, click here:

brainly.com/question/13495635

#SPJ4

7 0
1 year ago
PLEASE HELP!
mash [69]

Based on current data;

  • The amount of carbon dioxide put into the atmosphere annually dueto human activities is 840 gigatons
  • The amount of carbon in the atmosphere is 10 gigatons
  • The amount of carbon stored in fossil fuels is 10,000 gigatons

<h3>What is the carbon cycle?</h3>

The carbon cycle a cycle showing how carbon is recycled between the atmosphere and earth.

The carbon cycle ensures that their is a balance of carbon in the atmosphere as well as on earth.

Human activities have increased the amount of carbon in the atmosphere.

The amount of carbon dioxide human activities put into the atmosphere annually in the present day is 840 gigatons.

The amount of carbon in the atmosphere is 10 gigatons

The amount of carbon stored in fossil fuels is 10,000 gigatons

Therefore, it can be concluded that human activities disrupt the carbon cycle.

Learn more about carbon cycle at: brainly.com/question/24293689

7 0
2 years ago
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