Answer:
The correct answer is D. proliferation and differentiation.
Explanation:
Primary immune response occurs due to the first exposure of an antigen to the immune system. The primary immune response is generally delayed by many days because it takes time for B and T cells to become cloned and to proliferate and differentiate.
Then after several days of proliferation and differentiation of activated T and B cells, T cells become effector T cells and B cell becomes plasma cells which then eliminates the antigen. Memory B and T cells are also produced during this process which helps in generating a quick immune response during the second and subsequent exposure of that antigen.
So the correct answer is D. proliferation and differentiation.
One is were you bang someone else to reproduce and the other is where you bang yourself to reproduce
I think this is ether b. Trait or C. Allele, pretty sure it’s allele though. Good luck!
Answer:
Paired lungs
Explanation:
Paired lungs comprise the respiratory system of a bird.
Hope this helps! Please mark brainliest!
