One similarity between natural selection and genetic drift is that both events
A: are based completely on chance.
B. begin with one or more mutations.
C. involves a change in a population's allele frequencies.
D. takes place only in very small groups.

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.

Look at the photo of the leaf. which term best describes this leaf?

Do you think the gene eef1 alpha1 supports cell theory? explain your response.