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Question 21M.1.HL.TZ1.25

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Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.1.HL.TZ1.25
Level HL Paper 1 Time zone TZ1
Command term Question number 25 Adapted from N/A
25.
[Maximum mark: 1]
21M.1.HL.TZ1.25

The graph showing blood levels of hormones associated with the menstrual cycle.

     

[Source: By OpenStax College - Anatomy & Physiology, Connexions Web site. http://cnx.org/content/col11496/1.6/, Jun 19, 2013, CC BY 3.0 (https://creativecommons.org/licenses/by/3.0/), https://commons.wikimedia.org/w/index.php?curid=30148641.]

 

What event occurs approximately at the time of the dotted line (time X)?

A. Menstruation

B. Ovulation

C. Development of the primary follicle

D. Implantation

[1]

Markscheme

B

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