A student investigating support in plants observed that breadfruit leaves remained firm while attached to the tree but became limp after being cut and left in the sun for two hours. Which explanation is correct?

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Question

A student investigating support in plants observed that breadfruit leaves remained firm while attached to the tree but became limp after being cut and left in the sun for two hours. Which explanation is correct?

Accepted Answer

Water supply was cut off, causing loss of turgor pressure — Award 1 mark for identifying that cutting the leaves stopped water supply, leading to wilting. C is incorrect because lignin does not break down quickly. A is incorrect because photosynthesis affects food production, not immediate support. B is incorrect because cell walls do not dissolve when leaves are cut.

Answer

Water supply was cut off, causing loss of turgor pressure

Answer

Photosynthesis stopped, reducing glucose in cells

Answer

The cell walls dissolved in the absence of the tree

Answer

Lignin in the leaf cells broke down after cutting

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