A polar bear could not live in the jungle. An alligator could not live near the North Pole. Humans can live in both of these places because

Litmus paper is made from water-soluble dyes which are extracted from lichens. this paper is used as an acid-base indicator. which of these common household substances would turn blue litmus paper red? a) bleach b) lye c) soap d) vinegar

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled

About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?