<span>The answer for your question is
B. A warm air mass overtakes a cold one, and the warm air gradually rises and cools. The water in the air condenses to form clouds and gentle rain.</span>
<span>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)</span>
Answer:
Nope!
Explanation:
Receptors in muscles provide the brain with information about body position and movement. The brain controls the contraction of skeletal muscle. The nervous system regulates the speed at which food moves through the digestive track.
Answer:
A cell is the smallest unit of a living thing.
