43. Organisms that reproduce sexually display a high frequency of genetic variation. Which two
meiotic processes provide most of the genetic diversity of a species?
A. synapsis and separation
C. polar migration and cytokinesis
B. replication and condensation
D. independent assortment and crossing over

D. independent assortment and crossing over.

Explanation: Genetic diversity of a species occurs when crossing over of the chromosomes is done in the process of meiosis. In crossing over, the parts of chromosomes are exchanged between two different chromatids for the production of gametes due to which variation occurs in the organisms. So crossing over is very important for producing genetic variation among species.

the electromagnetic energy from the sun arrives in the form of visible and invisible light.