How do analogous structures support the pattern of convergent evolution? a) They show how organisms change due to genetic variation over time.
b) They prove that physical features of organisms evolved from a common ancestor.
c) They show how similar selective pressures create similar adaptive traits in unrelated organisms.
d) They prove that all organisms naturally develop advantageous features to improve survival and reproductive rates.

What sentence best supports the statement that hormones are involved in the regulation of homeostasis? a. the hormone erythropoeitin increases the production of red blood cells when oxygen levels are low. b. the hormone oxytocin promotes labor contractions of the uterus during childbirth. c. the hormone melatonin induces sleep and its production is slowed by exposure to light. d. the hormone cortisol suppresses the immune system and is produced when the body is under stress.

Milk production during breastfeeding is increased by the suckling of a newborn from his mother's nipple. this type of feedback mechanism best describes a positive or negative

In each transformation of energy , some energy what?