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Verdich [7]
4 years ago
7

What valve prevents blood from returning to the right ventricle?

Biology
1 answer:
Nat2105 [25]4 years ago
8 0
<span>tricuspid valve prevents blood from returning to the right ventricle.</span>
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PCR is used to – DNA. It uses – to separate a DNA molecule, and then uses a(n) – to start – at a point selected by scientists. T
enot [183]

Answer:

The correct answer is - amplify, heat, primer, replication and copies.

Explanation:

Polymerase chain reaction is known as PCR. PCR is also known as a method that rapidly produce millions to billions copies of atargeted DNA sequence. It is widely used method for the separation of small DNA and amplify it to large amount to study by scientists.

So, the missing parts of the paragraph would be -

PCR is used to amplify DNA. It uses heat to separate a DNA molecule, and then uses a primer to start replication at a point selected by scientists. This technique can produce millions of copies of a targeted DNA sequence.

Thus, the correct answer would be -amplify, heat, primer, replication and copies.

8 0
3 years ago
Glucose can be stored as glycogen in the liver and muscles. blood and lymph. liver and kidneys. heart and kidneys .
Yuliya22 [10]
The Answer is
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Answer:

<u><em>Microbes,Tuberculosis,Cholera,Feline Immunodeficiency Virus, Symbiosis and Leaf-Cutter Ants</em></u>

Explanation: Hope this helps bro

3 0
3 years ago
I need help asap in the sculpturing earths surface unit test lesson 9 unit 5
Naddik [55]
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Exogenous processes - Above the surface of the earth.
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Many organisms depend on the land as a food source. Seasons can affect the amount of food that is available to these organisms.
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the deer population will decrease

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