Think of endotherms that live in polar regions. What adaptations do they have that allow them to maintain their body temperature in such cold environments?

Which member of the following food chain will be least affected by ddt, a pesticide water pollutant, if bio-magnification is occurring? algae> zooplankton> crayfish> leopard frog> large mouth bass

Which statement is true for bacteria a. bacteria have complex internal structures b. all bacteria are spiral in shape c. all bacteria cause disease in animals d. bacteria break down some foods

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic