Answer:
directional selection, is a mode of negative natural selection in which an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time in the direction of that phenotype.
Stem in plants:
Is the movement of material like water and minerals from roots to leaves. And they storage foods.
first generation maybe im not a big biology freak and the second might be second generation im not super sure but srry if its not but its worth the shot :p
Inflation theory is the correct answer.
