What is the name of the polysaccharide produced by animals and stored in the liver and muscle?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

The mixture of sperm and fluids from the seminal vesicles, prostate gland, and cowper's glands is called

How are viruses different from eukaryotic cells?