Groups of different species that live together in a defined area make up a 1)ecosystem 2)community 3)biosphere 4)population

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

How does human environment effect the biosphere

If a strand of dna has 35% thymine. what is the percentage of cytosine, adenine, guanine?