Answer:
The answer is RNA. Only RNA has one single strand, DNA has 2
40 to 60 breaths per minute
Diffusion is the spontaneous movement of gases, without the use of any energy or effort by the body, between the gas in the alveoli and the blood in the capillaries in the lungs. Perfusion is the process by which the cardiovascular system pumps blood throughout the lungs.
Hox genes are orthologous across different species—that is, the genes’ functions are conserved in different species that have common ancestry. The most accurate answer choice here would thus be the first one.
