Which of the following statements concerning immunological memory is true?
a. the memory response involves only b cells.
b. the memory response is due to production of long-lived memory cells that can respond very rapidly upon second exposure.
c. antibodies produced in response to a secondary infection are mostly igm.
d. the memory response is usually faster but not as strong.

Option B

The memory response is due to long lived cells that can respond rapidly to second exposure.

Explanation:

Immunological memory is the ability of the immune system to quickly identify and remember an antigen from a pathogen that the body has encountered before and initiate a faster immunological response upon a reencounter with the particular antigen. This dependents on colonial selection.. The memory cells have a long life span and can remain in the body for a long time. When it encounter the antigen its previously encountered for the second time, they mobilize quickly and become plasma cells, these secrets a lot of antibodies and cause a stronger reaction to defend against such antigen in a short time.

Photosynthesis converts carbon dioxide and water into oxygen and glucose.  Cellular respiration converts oxygen and glucose into water and carbon dioxide. Photosynthesis and cellular convert different things that is how they are different.

Explanation: