| Date | May 2012 | Marks available | 1 | Reference code | 12M.1.HL.TZ2.35 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Define | Question number | 35 | Adapted from | N/A |
Question
What is clonal selection?
A. Production of memory B cells
B. Production of a group of identical organisms
C. Passive immunity as a result of inoculation with antibodies
D. Mitotic division of B cells activated in response to an infection
Markscheme
D
Examiners report
N/A
