10. Which of the following is a critical factor in species survival? a. Age structure
b. Genetic diversity
C. Fertility
d. Hybrids
^please answer

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

Which of these organisms have the greatest amount of cell specialized

What can be found in every skeletal muscle? a. nerves, bones, cartilage, and connective tissue b. tendons, cartilage, nerves, and blood vessels c. muscle fibers, nerves, connective tissue, and blood vessels d. tendons, nerves, blood vessels, and bones