Igcse Model Questions Vol1 2022 Biology Question 40
Practice objective / multiple choice question 40 from the 2022 Igcse Model Questions Vol1 Biology examination.
Desert cactus tissue can store water up to 150 mL per kilogram of fresh tissue. A mature cactus has 2 kg of tissue and is fully saturated at the start of a dry period. Typical C\(_3\) plants lose water by transpiration at a rate of 12 mL kg(^{-1}) day(^{-1}). The cactus uses Crassulacean Acid Metabolism (CAM), which reduces its water loss to 40 % of the C\(_3\) rate. Assuming no rainfall or other water sources, for how many whole days can the cactus survive before its stored water is exhausted? (Round down to the nearest whole day.)
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This is Igcse Model Questions Vol1 2022 Biology Question 40. It is one of the objective questions from the 2022 Igcse Model Questions Vol1 Biology examination.
Difficulty level: Hard .
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