Answer:
B. It is done by humans to select certain traits useful to us.
Explanation:
There are two main types of selection: natural and artificial. Natural selection is all of the other answers, it is seen over generations and allows the fittest to survive. It also occurs with no human intervention. However, artificial selection is done by humans. It occurs when humans breed animals to best fit their needs. This is best seen in dog breeding.
This is an 8th grader question. But I'll say Xx Xy
Answer: 25%?
Explanation: theres 4 children and the moms a carrier so 1/4 of 100 is 25%
Even when asymptomatic, the virus can still be actively multiplying and killing cells in the immune system that help fight pathogens. This is further explained below.
<h3>What is a
virus?</h3>
Generally, the virus is simply defined as a virus consisting of a core of genetic information, either DNA or RNA, wrapped by a capsid, which is a protective covering formed of protein.
In conclusion, It is possible for the virus to be actively reproducing and destroying immune cells even in the absence of any outward symptoms.
Read more about the virus
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Answer:
Moving things in and out of the cell is an important role of the plasma membrane. It controls everything that enters and leaves the cell. There are two basic ways that substances can cross the plasma membrane: passive transport, which requires no energy; and active transport, which requires energy.