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Masja [62]
3 years ago
7

Question 16

Biology
1 answer:
Mrrafil [7]3 years ago
6 0

Answer:

The answer to your question is: B) Mercury, zinc and Cadmium

Explanation:

A)iron, nickel, and cobalt  These elements are in different groups so this option is incorrect.

B)mercury, zinc, and cadmium  These elements are located in group number 12, this is the right option.

C)copper, silver, and gold  These elements are located in group 11, this option is incorrect.

D)neon, helium, and xenon These elements are located in group 18 or 8A, so this option is incorrect.

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Discuss how the human immune system responds to an initial pathogenic exposure and how this initial exposure can lead to a quick
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Answer:

Immediately, the pathogen has been recognized:

Macrophages acts as the first line of defence by engulfing pathogens identified by antigens which will now present the antibody shape to a helper T cell.

The Helper T cells produce a signal to plasma and Memory B cells to yield antibodies that attach to the antigens. The cytotoxic cells that leads to cell death are activated by the helper T cells.

Antibodies helps to immobilize pathogen for macrophage to feed on.

if the pathogen comes back a 2nd time the memory cells helps in quick and efficient recovery by producing the specific B and T cells for the antigen.

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3 years ago
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sergejj [24]

Answer:

No, it has too many variables or possible changes.

Explanation:

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3 years ago
True or false: oxygen and glucose are produced by photosynthesis and consumed in cellular respiration.
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NikAS [45]

Answer:

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Explanation:

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4 0
3 years ago
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