Ijmb Model Questions Vol1 2023 Biology Question 9

Practice essay / theory question 9 from the 2023 Ijmb Model Questions Vol1 Biology examination. This question covers Angiosperm reproduction, Asexual propagation, Environmental stress and plant adaptation, Human menstrual cycle hormonal regulation .

Ijmb Model Questions Vol1 2023 Biology Essay / Theory
Topics: Angiosperm reproduction Asexual propagation Environmental stress and plant adaptation Human menstrual cycle hormonal regulation
Question 9 IJMB_MODEL_QUESTIONS_VOL1 • 2023 • BIOLOGY • essay

A tropical plant species, *Lythrum tropicalis*, exhibits both sexual reproduction via flowers and asexual reproduction through stoloniferous runners. In a region experiencing prolonged drought, the plant population declines sharply.

Question Parts

( a )
Describe the anatomical structures involved in sexual reproduction of angiosperms and explain how they function to ensure successful fertilisation.
( b )
Explain the physiological and ecological advantages of asexual reproduction by stolons in *L. tropicalis* under drought conditions.
( c )
Considering the drought scenario, predict which mode of reproduction will dominate the next generation and justify your prediction with reference to resource allocation and survival probability.
( d )
The menstrual cycle in humans is regulated by feedback loops involving estrogen, progesterone, LH and FSH.
( ) Outline the hormonal changes that occur during the follicular phase.
( ) Describe how a disruption in the LH surge could affect ovulation and subsequent fertility.

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About This Question

This is Ijmb Model Questions Vol1 2023 Biology Question 9. It is one of the essay questions from the 2023 Ijmb Model Questions Vol1 Biology examination.

The question covers Angiosperm reproduction, Asexual propagation, Environmental stress and plant adaptation, Human menstrual cycle hormonal regulation .

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