You leamed that carbon is an important building block of organisms and that moves through organisms, between organisms, and the physical environment. Read the questions below about carbon and number your answers in your response.
1. Where are two places that carbon is found in the environment?
2. How is carbon involved in the process of photosynthesis?
3. How is carbon involved in the process of cellular respiration?
4. How is carbon involved in the process of decomposition?

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.

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution

Which of the following is the function of the nociceptors? a. detecting odors in the nose b. detecting painful stimuli c. detecting central body temperature d. detecting touch and pressure