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Luda [366]
2 years ago
9

Coordinate the immune system response by activating effector cells Memory B and T cells Helper T cells B cells Cytotoxic T cells

Biology
1 answer:
LekaFEV [45]2 years ago
8 0

Answer:

Helper T cells

Explanation:

This is because it is a type of adaptive immune system that stimulate B cells, microphages and cytoxic T cells. Helper T cells are used in different adaptive immune responses. They help to activate B cells so as to produce antibodies and also help macrophages to destroy ingested microbes. they also help activate cytotoxic T cells which will inturn kill infected target cells.

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3 0
3 years ago
The main function fo the placenta is to
Mariana [72]

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The organ that supplies oxygen and nutrients to the growing baby

Explanation:

7 0
3 years ago
Give an example of an interaction invloving the cycing of matter between spheres
Juli2301 [7.4K]

Answer:

Several examples of sphere interactions can be inferred from this photograph: Humans (biosphere) built a dam out of rock materials (geosphere). Water in the lake (hydrosphere) seeps into the cliff walls behind the dam, becoming groundwater (geosphere), or evaporating into the air (atmosphere).

Explanation:

I hope this helps:)

5 0
3 years ago
C4 plants occur more commonly in desert conditions because _____. a. they can fix carbon at the lower CO2 concentrations that de
ahrayia [7]

Answer:

a. they can fix carbon at the lower CO2 concentrations that develop when the stomata are closed

Explanation:

C4 plants are those that have the capacity to fix CO2 even when a tiny concentration of it is available.

Desert condition is characterized by dryness and strong heat with both condition capable of creating water stress in plant as a result of evapotranspiration. In order to reduce evapotranspiration rate, desert plants (most C4 plants) close their stomata during the day.

<em>Stomata closure limit the diffusion of CO2 into desert plants and the small concentration of CO2 that results is utilized by a special enzyme in the plants.</em>

The correct option is a.

6 0
3 years ago
Read 2 more answers
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Answer:

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8 0
2 years ago
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