Which sentence best describes vestigial structures? they contain genetic mutations. they may have had an important function in the past. they are necessary for an organism's survival. all animals have them.

Vestigial structures are best described as: They may have had an important function in the past

Answer: They may have had an important function in the past.

Explanation:

Vestigial structures are the ones which are present in an organism but do not serve any essential function in the organism. It is believed that these structures must have served an important function in the past but have lost their functionality over the course of evolution.An example of vestigial structures found in humans is the tailbone.

Crossing over creates new combinations of genes in the gametes that are not found in either parent contributing to genetic diversity

Cuz i said so. which gives it to b