As people enter old age, some of the changes the body undergoes includes:

a. deteriorating eyesight
b. decreased strength
c. less flexibility
d. all of the above

Why do rna viruses appear to have higher rates of mutation? a) rna nucleotides are more unstable than dna nucleotides.b) replication of their genomes does not involve proofreading.c) rna viruses can incorporate a variety of nonstandard bases.d) rna viruses are more sensitive to mutagens.

Lifestyle diseases are caused by a combination of

Which of the following is the best description of health protecion the answer is b the direct actions taken by health organizations to improve public health