The grizzly bear feeds on salmon that migrate upriver from the ocean during the spawning season. these fish are rich in carbon, nitrogen, and sulfur. the bears leave half-eaten fish and nutrient-rich feces on the forest floor. due to its role in this ecosystem, the grizzly bear would be classified as a

Which statement names a chemical property of iron? a: it is dense b: it becomes rusted c: it’s hard to bend d: it has a melting point

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.

Is there any solid scientific evidence that humans have been cloned?