How many vacuoles does a plant cell usually have?

What best describes the dropping height of a ball that bounces back up to a height of 45 cm

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 these is not a nucleotide base found in dna?