Which physical changes are associated with the aging process? Check all that apply. increased muscle mass
thickening of the heart
stiffening of the arteries
O increased lung capacity
redistribution of body fat
bone loss
improved ability to hear

What is the function of reverse transcriptase in retroviruses? a) it uses viral rna as a template for dna synthesis. b) it converts host cell rna into viral dna. c) it translates viral rna into proteins. d) it uses viral rna as a template for making complementary rna strands.