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UNO [17]
1 year ago
12

How much tropical rain forest is cleared every minute?

Biology
1 answer:
maria [59]1 year ago
5 0

Answer:

100 acres of tropical rain forest are cleared every minute.

Explanation:

I had this question on a quiz and got it right. I hope I could help.

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In living cells what is the energy carrier that fuels most kinds of cellular work
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Adenosine triphosphate.
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3 years ago
I need help can you pls help me <3
Gala2k [10]

Answer:

temparate deciduous

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tropical rain forest

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tropical rain forest

temperate deciduous rainforest

Explanation:

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How are humans affecting the global food<br> supply?
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SPONCH, a memory key for the important elements in living things stands for
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3 years ago
What is the basic difference in effector function between helper and cytotoxic T cells?
3241004551 [841]

Answer:

Helper T cells stimulate B-cells to produce antibodies and killer T cells to destroy the non-self cells. Cytotoxic T cells on the other hand are direct attack cells. They can kill the micro organisms by creating pores on the invader's cell.

Explanation:

T lymphocyte mediated immunity of cell mediated immunity do not secrete antibodies but they help stimulate the B cells to produce them. Immature T cells are produced in bone marrow from where they migrate to thymus via blood. In the thymus maturation of T cells occur and then they migrate to lymphoid tissue and get differentiated into three types:

a. Helper T cells: As the name suggests, they help in activating other immune cells, in other terms they are the regulator of virtually all functions of immune system. Protein mediator called lymphokines are produced by these helper T cells in order to regulate the immune functions. Some examples of these lymphokines are: Interleukin-2 interleukin-3, interferon gamma. T helper cells stimulate the B-cells to produce antibodies.

b. Cytotoxic cells or killer T cells: The lymphokine interleukin-2 is responsible for the growth and proliferation of both cytotoxic T cells and suppressor T cells. With the help of receptor proteins on the surface of killer T cells, they bind to the specific antigen. After binding, they secrete a pore forming protein called perforins which create pores on the invaders cell membrane for water to enter into it thereby cell swells and finally lyse.

c. Suppressor T cells: They suppress the function of above two T cells.

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3 years ago
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