What happens to an enzyme when exposed to heat. how is this similar to what happened to crayons?

Isolated volcanic peaks on the ocean floor are

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

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