Which of the following need salt in it's enviroment to survive? a. squirrel b. shark c. toad d. cactus

The answer is B. Shark. This is because sharks are a "sea" creature. So they will only be found in the ocean OR in a salt-water aquarium.

i think it would be the shark option. there is one kind of shark that can live in any water and that is the bull shark. it can live in a lake, freshwater ocean and many more. researchers put other shark species into freshwater and noticed that they move slower in freshwater.

hope i helped

both anaerobic and aerobic respiration use glucose (or other carbohydrates), proteins and lipids to produce atp and nadh. cell uses those energy molecules, obtained from food and   breaks them down during the chemical reactions of respiration. in anaerobic respiration, nadh is regenerated to nad+ by enzymes lactate dehydrogenase (lactate is produced, e.g. in muscle cells) or by alcohol dehydrogenase where ethanol is produced (alcohol fermentation), while in aerobic respiration, electrons from nadh are deposited in the mitochondria to regenerate nad+ (electron transport chain. anaerobic respiration produces 2 atp per molecule of glucose compared to aerobic respiration where about 38 atp molecules are produced.