Waec Model Questions Vol1 2021 Biology Question 31

Practice objective / multiple choice question 31 from the 2021 Waec Model Questions Vol1 Biology examination.

Waec Model Questions Vol1 2021 Biology Objective / Multiple Choice Hard Difficulty
Question 31 WAEC_MODEL_QUESTIONS_VOL1 • 2021 • BIOLOGY • objective

Two desert plants employ different adaptations to survive drought. Plant A (a cactus) has a thick waxy cuticle that reduces its transpiration to 15 % of that of a typical leaf. A typical leaf loses 1.2 L of water per day. Plant A also stores 6 L of water in its tissues at the beginning of a drought. Plant B (a shrub) possesses a deep taproot that allows it to absorb 0.4 L of water per day from the water table, but its leaves have a normal cuticle and lose water at the same rate as a typical leaf. If a drought lasts 25 days with no rainfall, which plant will have a net positive water balance at the end of the drought?

Answer Options

A. Neither plant has a net positive water balance
B. Plant B (the shrub)
C. Plant A (the cactus) but with no water storage
Correct Answer D. Plant A (the cactus)
Correct Answer
D
Correct Option:
Plant A (the cactus)

About This Question

This is Waec Model Questions Vol1 2021 Biology Question 31. It is one of the objective questions from the 2021 Waec Model Questions Vol1 Biology examination.

Difficulty level: Hard .

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