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ivann1987 [24]
2 years ago
12

Hom0 sapiens is the scientific name for all humans. What classification level (what taxa) does Hom0 belong to? What about sapien

s?
Biology
1 answer:
Ivahew [28]2 years ago
5 0

Answer:

Hominidae

Explanation:

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Which phenomenon occurs when the sun crosses the plane of earth's equator​
Evgen [1.6K]

The phenomenon is called an equinox. More specifically when it is September it is called the autumnal equinox ,and when it is March it is called the vernal equinox.  Hope this helped!

6 0
3 years ago
In the reaction ______ H2 + N2 ----> 2 NH3, what coefficient should be placed in front of H2 to balance the reaction?
schepotkina [342]

2NH3 is equivalent to N2 + H6 since the 2 at the beginning gets distributed to both atoms. Knowing this you can rewite the equation as

H2 + N2 = H6 + N2

The N2 can cancel out leaving

H2 = H6

You now have to ask ‘2 times what equals 6?’ The answer is obviously 3 at this point.


Answer: C. 3


5 0
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.

5 0
3 years ago
What is the difference between DNA pol 3 core and holoenzyme?
Dima020 [189]

Answer:

Essentially there is not an answer. There are two different definitions.

A holoenzyme is an enzyme that needs to be together with a cofactor(s), required for activity.

In some cases, enzymes constituted by several subunits (like DNA polymerase 3) are call holoenzyme as well, because it will only perform correctly when all its subunits are present.

3 0
3 years ago
What types of local winds would you experiemce if you were standing in a valley at night
Neporo4naja [7]
Hey there,

Your question states: <span>What types of local winds would you experience if you were standing in a valley at night?

</span><span>The type of local winds would you experience if you were standing in a valley at night would be like a </span>\boxed{valley \ breeze}. Based on my research, when attending the valley of any sort, you would not really see like 10 MPH winds, there winds are not powerful at all. They are little breeze that feel good. That it why your answer is Breeze :)

~Jurgen
4 0
3 years ago
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