A vaccine contains

a) antigens

b) antibodies

c) antibiotics

d) enzyme inhibitors

Aperson with age is more likely to catch diseases that healthy people usually don’t catch. what are these infections called?

Use the phylogenetic tree to the right to determine which statement below is true. organisms a and f are not related. organism e is more closely related to organism b than organism f. organisms c and d are more closely related than organisms a and b. phylogenetic trees

Archaebacteria use for movement. celia flagella pili cell walls