How do viruses recognize their hosts? A. they recognize and infect all organisms regardless of species
B. they recognize their hosts with the lock-and-key fit
C. They recognize the pilli in prokaryotes
D. They recognize the cilia in eukaryotes

The oxidizing agent our bodies use to obtain energy from food is oxygen (from the air). if you breathe 15 times a minute (at rest), taking in and exhaling 0.5 l of air with each breath, what volume of air do you breathe each day? air is 21% oxygen by volume. what volume of oxygen do you breathe each day?

Before the can be observed by using a transmission electron microscope, cells are sliced into very thin sections. what disadvantage does this procedure present in the study of cellular parts

Where does the information about where each transcription factor binds originate?