The concentration of na+ within a cell is required to be than the external concentration. a. higher b. lower c. the same

Which of the following represents a negatively charged ion? of t 7

What effect does plate tectonics have an organic evolution

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.