Which of the following is the best example of a way human lifestyles affect environmental systems? burning fossil fuels increases the amount of greenhouse gases in the atmosphere. using radioactive materials causes ground pollution when chlorofluorocarbons (cfcs) seep into the ground. deforestation causes water pollution by decreasing water vapor in nearby lakes and rivers. using aerosol sprays increases the amount of ozone (o3) in the atmosphere.

Consider the diagram below, which represents components of the biosphere. what do the two arrows in the diagram most likely represent? a. radiation b. photosynthesis c. cellular respiration d. energy conversions will give to anyone who answers quickly

Turtle hatchling survivorship rate is low in many turtle species due to predation. amanda researched the predatory rate on a species of turtle eggs in the red river. the eggs were harvested from trapped turtles and the egg's cloaca film (reproductive discharge) was either washed off or left on once gathered. research suggests that predators use the female's cloaca scent to locate the eggs. the eggs were only handled when wearing gloves and then reburied along islands where the turtles were trapped. the nests were monitored by cameras and manually on foot and data on nest predation were recorded. a. based on the experimental design, what is the dependent variable? b. based on the experimental design, what is the independent variable? c. based on the experimental design, what is the control?

Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi