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SashulF [63]
3 years ago
9

Select the statement that BEST describes the specific roles of white blood cells in the immune response.A.Platelets and antigens

are types of white blood cells that control the immune response.B.T cells and C cells produce antigens that are able to recognize and attack cells with antibodies.C.Platelets and red blood cells produce antigens, which allows T cells and B cells to recognize antibodies.D.T cells attack antigens on foreign substances and B cells produce antibodies.
Biology
1 answer:
Elanso [62]3 years ago
7 0

Answer:

<u>Option-(D):</u>T cells attack antigens on foreign substances and B cells produce antibodies.  

Explanation:

  • The defense mechanism or we can say the immune system is divided into many layers of cells, as the primary protection for the human body is the integumentary system or simply skin and the rest of the defense lines follow up. As, there is a proper channel for the different molecules to pass through the body, while the pathogens or those hazardous molecules which are required to be removed are identified with the help of the B-cells and the T-cells kill or eliminates them to avoid any further damage to the human body.
  • However, both of the cells are termed to be related to the interstitial spaces inside the human body, which is also called as the lymph and the cells are called as lymphocytes.
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Answer: C: Decomposers

Explanation: The mud and pond water likely contain some sort of <em>decomposing bacteria</em>. These bacteria can break down the complex nitrogen compounds in the dead fish, <em>producing simple nitrogen compounds.</em> These simple nitrogen compounds can then be used by the plants added to the terrarium.

A is wrong because <u>producers (such as the green plants added to the terrarium) can not break down the complex nitrogen compounds</u> in the fish's body.

B is wrong for a similar reason. <em>Algae are primary producers.</em> Because of this <u>they also lack the ability to break down the complex nitrogen compounds</u> found in the fish's body.

D is also wrong. A virus may be able to infect the fish and cause disease, but <u>it lacks the ability to break down the complex nitrogen compounds </u>found in the fish's dead body.

Since A, B, and D are wrong, along with the fact that we know that decomposers <em>can</em> break down the complex nitrogen compounds in the dead fish, we can conclude that C is the correct answer.

6 0
2 years ago
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ANEK [815]

Answer:

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3 0
3 years ago
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Answer:

A

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3 years ago
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marshall27 [118]

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Explanation:

Recombinant DNA technology (also called genetic engineering) is the combination of DNA molecules from two different species to create new genetic combinations that would not otherwise be found in the genome and that is of great importance to science and other fields. Recombinant DNA technology is mainly involved in the isolation, characterization, and alteration of DNA in organisms’ genome to create improved or novel organisms.

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D is false. Decomposers are a separate level in of itself, so as far as “decomposers play a role at all trophic levels” go, the answer choice would be invalid, and thus forth is the correct answer. All other answers seem to be valid.
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2 years ago
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