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Biology · 2024 · 2 marks
CBSE 2024 · Region 4 · Set 3 · Q18
Study the graph given below that represents the changes in the thickening of the uterine wall in women 'X' and women 'Y' over a period of one month:…
Study the graph given below that represents the changes in the thickening of the uterine wall in women 'X' and women 'Y' over a period of one month:
What does the graph with respect to woman 'X' and woman 'Y' indicate? Give suitable reason.
What does the graph with respect to woman 'X' and woman 'Y' indicate? Give suitable reason.Marking-scheme solution
• X- In woman X thickness of uterine wall increases after mid of
menstrual
cycle;
Reason-
due
to
fertilization
of
egg/pregnancy/conceived
• Y- In woman Y thickness of uterine wall decreases after mid of
menstrual cycle; Reason- egg has not been fertilized/leading to the breakdown of lining of the uterus/menstrual flow/ bleeding.
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CBSE Class 12 Biology past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.