Is the ability of one drug to enhance the effect of another.

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Grasses--> mice--> cats--> coyotes suppose 10,000 units of energy are available at the level of the grasses. what is the total number of energy units lost by the time energy reaches the coyote?

Which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above