CAN SOMEONE PLZ HELP ME I NEED THIS GRADE

A= stabilising selection, B= directional selection

Explanation:

A:

stabilising selection is any type of force that pushes the population towards a mean trait .

B:

Directional selection, or positive selection is a mode of natural selection in which an extreme phenotype is favoured over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype. So imagine in your graph for be there are two different phenotypes, this type of selections drives the preference of phenotype in one direction so you end up with more individuals with that specific phenotype.

A major difference between monerans and protists lies in the nucleus, which is the "command center" of a cell. Monerans do not have a true nucleus, while protists have nuclei bound in their own nuclear membranes. Scientists classify organisms with true nuclei as eukaryotes and organisms without them as prokaryotes.

Explanation: