Why is active transport the opposite of passive transport (osmosis and diffusion).

Cells tend to have a relatively small and uniform size. why aren’t cells larger?

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

Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.