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NikAS [45]
3 years ago
6

Many male birds will expend A great deal of energy building nests. Females will mate with the males who build the best nest. Thi

s is best described as an example of ___.
a) natural selection
b) sexual selection
c) runaway selection
d) an invasive species
e) disruptive selection
Biology
1 answer:
crimeas [40]3 years ago
6 0

Answer:

B

Explanation:

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Answer:

2+

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The first glycolysis rate-limiting enzyme is under various allosteric regulations. This protein is nearly inactive because of in
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Answer:

d. ATP;  Fructose-2,6-bisphosphate

Explanation:

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Phosphofructokinase-1 activity is allosterically regulated. Its activity is increased whenever the cell's ATP supply is depleted or when its breakdown products, ADP and AMP accuulates in he cell. However, it is inhibited when the cell is amply supplied with ATP.

The activity of phosphofructokinase-1 is restored by fructose-2,6-bisphosphate, its most potent activator.

From the given options:

a. AMP :::: citrate  is wrong because AMP increases the activity of phosphofructokinase-1 and citrate is not its activator but an inhibitor

b. AMP :::: Fru-2,6-P2  is wrong because AMP increases its activity same as fructose-2,6-bisphosphate

c. ATP :::: citrate  is wrong because both citrate and ATP are inhibitors

d. ATP :::: Fru-2,6-P2  is correct as explained above

e. All of these is wrong because of the other wrong options above.

6 0
3 years ago
What is the ionosphere? Where is it located?
dybincka [34]

Answer: Located within the thermosphere, the ionosphere is made of electrically charged gas particles (ionized). The ionosphere extends from 37 to 190 miles (60-300 km) above the earth's surface. It is divided into three regions or layers; the F-Region, E-Layer, and D-Layer.

Explanation:

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3 years ago
The diagram above shows four steps in an attempt to investigate the release of gas during photosynthesis. Each setup was kept at
Lena [83]

Answer:

light

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After the experiment, oxygen gas is produced being a by-product of photosynthesis. Plants that are not adapted to an aquatic environment are not suitable for this experiment. The amount of carbon dioxide dissolved in water is low.

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