A friend is studying population genetics of the T locus in beetles in Africa. He says that over 30 years the frequency of the T allele has declined from 0.7 to 0.2. He is convinced that directional selection favors the t allele because tt animals burrow better. Why would you ask about population sizes before you accepted his explanation

answer; the tunica intima also called tunica interna, consists of elastic fibers,connective tissue and smooth muscle cells;

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex

ya the other dude is right

a scenario where a cell may be needed to perform a form of endocytosis is when transporting large molecules. a scenario where a cell may be needed to perform a form of exocytosis is when releasing the large molecule from the cell.