Which substance is the most basic? a. ammonia (ph 11.5) b. vinegar (ph 3.0) c. baking soda (ph 8.2) d. rain (ph 5.6)

Classify the structures as homologous or analogous, depending on their structure and function.

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.

Mineral rich water heated by newly found oceanic crust escapes through cracks in the ocean floor called