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neonofarm [45]
2 years ago
9

SOMEONE PLEASE ANSWER THIS FOR BRAINLIEST!!!!!

Biology
2 answers:
Zarrin [17]2 years ago
7 0

It b. To cause the production of antibodies that will tag ana antigen

Lilit [14]2 years ago
3 0

I’m confuse between A and B but I think it is mostly B

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Answer:

Gel electrophoresis is a technique used to separate DNA fragments according to their size. DNA samples are loaded into wells indentations at one end of a gel, and an electric current is applied to pull them through the gel. DNA fragments are negatively charged, so they move towards the positive electrode. Really easy

Explanation:

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3 years ago
Scientists distinguish whether an entity is living or nonliving by describing the _____ of life.
Orlov [11]
Characteristics should be in the blank
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The structure that prevents backflow of blood into the left atrium is the . The vessel that carries oxygen-rich blood to tissues
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The structure that prevents backflow of blood into the left atrium is the mitral valve.

The vessel that carries oxygen-rich blood to tissues is the aorta.

The capillaries receiving blood flow from the left side of the heart are the Systemic capillaries.

The structure that is located anatomically between the aorta and the left ventricle is the Aortic semilunar valve.

Explanation:

The left atrium receives oxygen-rich blood from the pulmonary vein and passes it to the left ventricle. The back-flow of blood from the left ventricle into the left atrium is prevented by mitral which is a bicuspid valve. The vessel that carries oxygen-rich blood to tissues is the aorta.

Aorta receives oxygen-rich blood from the left ventricle and pumps it into its branches to deliver the blood to the body tissues. Systemic capillaries are the blood vessels that obtain the oxygen-rich blood from the left ventricle through the aorta. Systemic capillaries serve as the site for the exchange of gases and nutrients.

The aortic semilunar valve is located Aortic semilunar valve is the half-moon shape valve present between the left ventricle and aorta to prevent the black flow of blood to the left ventricle.

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3 years ago
it is only found in the plant cells that support the plant which is also made of specialized sugar called cellulose​
MAXImum [283]
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It is true that situational context is the social and environmental setting in which a particular behavior takes place.
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