Answer: Option C.
Macroevolution is a change in allele frequencies within a population.
Explanation:
Microevolution is the change in allele frequencies within a population over time. Microevolution is caused by four processes which are natural selection, artificial selection, gene flow and gene drift and these are referred to as fundament forces of evolution.
Id say D, that responses may include the spinal cord but not the brain.
Autosomal chromosomes or autosomes are found in the body cell, but not sex cells.
