Cardiac involuntarily pumps the heart, smooth involuntarily preforms peristalsis (digestion), and skeletal muscle voluntarily moves the body.
The answer is A.) particles need to collide in order to react.
Answer:
b
Explanation:
because of you have a sperm and an egg it wont be right and the others aren't well described
A.) An allele is a version of a gene that can be expressed as a phenotype.
