What is the main difference between Passive Diffusion and Active Transport? A. Active uses protein channels

B. Passive goes from low to high concentration

C. Active always uses energy (ATP)

What did hunter gathers do to alter the environment?

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.

Number and variety of living organism; includes genetic, species, and ecological types