Natural selection is a mechanism, or cause, of evolution. Adaptations are physical or behavioral traits that make an organism better suited to its environment. Heritable variation comes from random mutations.
Answer:
the answer is D because technology is what technicians work on
Answer:
Meiosis
Explanation:
Haploid number of chromosomes
Answer:
When exercising your muscles need more oxygen. Therefore your heart needs to pump more blood (which carries oxygen) to your muscles.