Aunicellular organism, like a bacterium, is made up of what?

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

What are the fixed alleles in the human species? o a. the alleles that are on the most chromosomes b. the alleles that change most often 000 c. the alleles that no one has d. the alleles that everyone has