Why is the majority of earth's freshwater not readily available for our use?

Which kind of aquatic ecosystem does the photograph most likely show? a. marsh b. swamp c. lake d. river

Why do mutations in genes affect traits? o a. genes determine what type of mutagens an organism has. o b. genes produce proteins that cause traits. o c. genes affect how many chromosomes an organism has o d. genes code for carbohydrates that influence traits.

Which type of respiration takes place when there is no oxygen present? a. anaerobic b. mitochondrial c. cellular d. aerobica. anaerobic