Digestions of carbohydrates is performed mostly by enzymes from the.

Explanation:

Pancreatic amylase is secreted from the pancreas into the small intestine

Small Intestine

Explanation:

The small intestine, pancreas, and liver

This causes the pancreas to release pancreatic amylase. This enzyme breaks down the chyme into dextrin and maltose.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).