When Darwin said that overproduction is needed for natural selection, he meant the following?
A there needs to be a large population of predators.
B there cannot be any predators.
C there must be a large population of offspring.
D there cannot be too many offspring

Which statement describes an endocrine function rather than an exocrine function? a. salivary glands release saliva into the mouth. b. sweat glands release sweat onto the skin c. the pineal gland releases melatonin into the blood. d. esophageal glands release mucus into the esophagus.

Q: a: in sexually reproducing animals, once fertilization of the egg takes place, the exists as a single cell until cell division begins

Diffusion and osmosis are forms of passive transport