Answer:
proteins is the answer of this question
Answer:
A. It is a source of genetic variation
Rainwater picks up carbon dioxide from the air and as it percolates through the soil, which turns into a weak acid. This slowly dissolves out the limestone along the joints, bedding planes and fractures, some of which become enlarged enough to form caves.
Cladistics is based on the shared characters between organisms and their network of evolutionary relationships.
