What adaptation protects the leaves of land plants from drying out? a. Lignin

b. Stomata and cuticles

c. Vascular system

d. Pollen and seeds

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation

Which is an important function of normal flora? a. aid with bone marrow production. b. crowd out pathogenic bacteria. c. destroy digestive track pathogens. d. manufacture iron in the bloodstream.

Give two examples of what would occur if one of the pairs did not match or had an extra chromosomes. explain how this might occur, and if it would be dangerous to the individual. fast.