How many similarities animal and plant cells have?: a)1, b)2, c)3, d)4.

Which of the following represents a negatively charged ion? of t 7

What causes darkening of the skin as melanin production increases

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.