Answer:
Carcinoma.
Explanation:
These tumors form from epithelial cells, which are present in the skin and the tissue that covers or lines the body's organs. Carcinomas can occur in the stomach, prostate, pancreas, lung, liver, colon, or breast.
Answer:
Variations are caused by mutation. random mating between organisms.
Explanation:
About 20 minutes<span>Sperm can live outside of the body for only about 20 minutes
to an hour, depending on how exposed the semen is to the air and other
environmental factors. To avoid the slightest risk of pregnancy, a woman
should make sure that ejaculated semen doesn't get at all close to her
vagina.</span>
Answer:
Nitrogen
Explanation:
The nitrogenous bases of the two separate polynucleotide strands are bound together, according to base pairing rules (A with T and C with G), with hydrogen bonds to make double-stranded DNA.