What is the meaning of selectively permeable?

Construct at least two possible hypotheses for the student’s experiment.

Science which of the following is an example of a cyclic behavior that is seasonal? i think the answer is d, i just need to double check : ). a. running from predators. b. searching for water. c. hunting at night. d. migrating for warmth. ***

On his trip to the galapagos islands, darwin determined that animals on the islands