A might be it not to sure sorry
What?? For what class egg
The Hardy-Weinberg equation is:

where p generally represents the frequency of the homozygous dominant population.
The q usually represents the frequency of the homozygous recessive population, and the 2pq term represents the frequency of the heterozygous population.
Hmm this is a rough explanations but because to be sure cells are made properly and not misfunctioning or going Rouge.
Cancer cells is an example of this, a cell goes rouge and starts doing it's function on it's own but outside of it's brother cells function slightly different turning into a growth or etc. The body thinks it is normal during the check body it's composed of the dna that passes this check.
viruses and other things don't pass this check and things like white blood cella come shut it down.
that's why doctors poison the area they find the cancer. to send white blood cells there to shut the area down not passing the check.
Answer:
(D) Z
Explanation:
Cellular respiration is a catabolic process by which cells produce energy by oxidising respiratory substrates such as glucose. It is a multistage process occurs in cytoplasm and in mitochondria of a cell. The first stage of cellular respiration is called glycolysis or EMP (Embden, Meyerhof and Parnas) pathway. This stage occurs in the cytoplasm of a cell which is labeled by Z in the given image.