What kind of animals are best suited to life in a desert?

An easy way to calculate the amount of energy available at each level is to what?

Living cells cannot use heat to provide the activation energy for biochemical reactions because which choice(s) complete the sentence correctly? a) answer choice ii. eliminate b) answer choices ii and iv. c) answer choice iii and iv. d) all answers can complete the sentence.

What might explain the real-world results, show in the graph to the right, for one class of twenty students? check all that apply.