<span>Population crash is a sudden decrease in the number of people found in a given area as a result of shortage or the lack of environmental resources necessary for reproduction, survival and growth of the population. It is also known as a die back. The answer to your question is A. population crash.</span>
Facilitated diffusion therefore allows polar and charged molecules, such as carbohydrates, amino acids, nucleosides, and ions, to cross the plasma membrane. Two classes of proteins that mediate facilitated diffusion are generally distinguished: carrier proteins and channel proteins.
Answer:
The correct answer is "p18, p21 and p27".
Explanation:
In this experiment, four proteins were blocked and the level of DNA replication was tested in different cell cultures to see which proteins may play a role in cell cycle. Based on the given data we can conclude that p16 is the only protein that appear to have a pivotal role in cell cycle, while p18, p21 and p27 apparently does not. We can conclude this by observing group 7 of cells, were cells have only p16 active and were able to have around 80% of DNA replication.
The question says that in a population of 400 flies, only 12 had red eyes.
The total number of fruit flies in this case is 400.
and
The total number of flies having red eyes is 12.
To find out the percentage of fruit flies having red eyes, following formula is used:

So, the percentage of red eye individual is;

Hence, the total percentage of red eye offspring is 3%.
Mitochondria is the powerhouse of the cell. It produces energy for the cell.