A person who is physically fit is able to produce more energy because he/she is more efficient in obtaining and delivering to the muscles

How harmful is it to smoke a pack of cigarettes a week?

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.

Cardiac output is affected by heart rate exercise stroke volume all of the above