B.Trees C.Animals & D.Plants are all biotic factors
A biotic factor is a living factor on an ecosystem, the sun is an abiotic factor because it is nonliving.
before it leaves the nucleus of a eukaryotic cell, mrna is altered in the following ways: - a cap is added to the 5' end of the mrna molecule; - a poly a tail is added to the 3' end; - introns are removed and exons are spliced together.
yes? sounds right, but you didn’t ask a question.