Biology is a static science that is never changing or evolving

In what for do plants utilize nitrogen? why do they need nitrogen?

In a population that is in hardy-weinberg equilibrium, there are two possible alleles for a certain gene, a and a. if the frequency of allele a is 0.4, what fraction of the population is heterozygous? a. 0.40 b. 0.60 c. 0.16 d. 0.48

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome