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Vika [28.1K]
3 years ago
8

All of the following have been accomplished by space programs except-

Biology
1 answer:
erica [24]3 years ago
3 0

Answer:

D

Explanation:

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Which of the following expresses -7 as m/n in simple form ?
kicyunya [14]

Answer:

A (-7)/(1)

Explanation:

(-7)/(-1) would be a positive 7.

7/1 would be a positive 7.

(-7)/(0) would be 0.

4 0
3 years ago
Which of these acts as a second messenger? which of these acts as a second messenger? cyclic amp g protein adenylyl kinase g-pro
forsale [732]

Answer;

Cycilc AMP

Explanation;

-Second messengers are molecules that relay signals received at receptors on the cell surface; such as the arrival of protein hormones, growth factors, etc., to target molecules in the cytosol and/or nucleus.

-Many of the chemical messengers such as hormones, that transmit messages from one cell to another never enter the target cell, these molecules are known as first messengers which work by binding to a specific receptor on the cell surface. The receptor then stimulates or inhibits the production of a so-called second messenger within the cell.

-The second messenger are small molecules such as Cyclic AMP, which activate an effector within a cell.

8 0
3 years ago
The fusion of haploid gametes is called
Sholpan [36]

Answer:

FERTILIZATION

Explanation:

Fertilization, the fusion of haploid gametes from two individuals, restores the diploid condition. Thus, sexually reproducing organisms alternate between haploid and diploid stages. However, the ways in which reproductive cells are produced and the timing between meiosis and fertilization vary greatly.

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3 years ago
The hydrosphere is defined as which of the following?
QveST [7]
<span>B) All water within the earth, on the earth, and in the atmosphere.</span>
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List 3 big disadvanges of having a mechanical heart ​
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no feeling

not always working

infections

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