Question

define ivolution and its cause

Answer 1

a substantial part of the phenotypic variation in population is caused by genotypic variation. the modern evolutionary synthesis defines evolution as the change over time in this genetic variation . natural selection will only cause evolution if there is enough genetic variation in population

Answer 2

➡️➡️Involution refers to the shrinking or return of an organ to a former size. At a cellular level, involution is characterized by the process of proteolysis of the basement membrane leading to epithelial regression and apoptosis, with accompanying stromal fibrosis. The consequent reduction in cell number and reorganization of stromal tissue leads to the reduction in the size of the organ