What membrane molecule is responsible for aiding passage of polar molecules into and out of the cell?

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

Where can a dna be found in a prokaryotic cell

If a grape were placed in a hypertonic solution what would happen and why?