Which cells in the body are targeted by HIV? red blood cells

platelets

B cells

T cells

Which best describes a benefit of using dna technology in medicine? a) medicine can be produced in mass quantities. b) medicine can be distributed at a reduced cost. c) medicines have fewer side effects. d) medicines are resistant to antibiotics.

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic