Which of the following is true concerning continental crust? a. it does not contain radioactive elements. b. it mostly contains heavier and denser minerals than the mantle. c. it efficiently transfers heat from the mantle to the surface. d. none of the above

How does a lytic infection differ from a lysogenic infection?

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity

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.