This question isn't really finished, but bacterium are unicellular prokaryote.
I hope this helps?.. :S
Answer:
C
Explanation:
Becuase fom a vaccine you are recieving antibodies by another animal or human donor.
D is unlinkely since it describes how the mother is nursing the baby, so nothing directly mentioning of the baby recieving any antibodies. The other options also talk about how the body creates its own antibodies, which isn't passive immunity.
A chemical reaction bonding monomers together to make a polymer
Skin is the Largest barrier agaisnt Pathogens which include Bacteria which cause infections.
