| Date | November 2011 | Marks available | 1 | Reference code | 11N.1.HL.TZ0.33 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 33 | Adapted from | N/A |
Question
What happens immediately after the penetration of the egg membrane by a sperm during fertilization?
A. The acrosomal reaction
B. The secondary oocyte develops
C. The blastocyst divides by mitosis
D. The cortical reaction
Markscheme
D
Examiners report
N/A
Syllabus sections
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