Raya is a gardening enthusiast who is looking to buy a new house. she wonders whether her house plants will grow well if she buys an apartment on a higher floor. she remembers that her friend jenn also has a small garden on her balcony, and her plants seem healthy. raya conducts an experiment to study the effect of altitude on the growth of plants. she gathers plant samples and places them on five different floors of a 20-story building. identify the basic components of raya’s experiment, including the confounding variable.

Why are small quantities of chlorofluorocarbons so harmful to the ozone layer? a. the chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced. b. the chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production c. free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone. d. chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone select the best answer from the choices provided

Identify the structures ! 20 points

Internal feedback works to maintain homeostasis when your a. heart rate decreases as your white blood cells increase b. breathing rate decreases as your red blood cells decrease c. heart rate increases as your liver is cleaning blood d. breathing rate increases as your heart rate increases