A student studying mangrove ecosystems in Guyana observed that red mangrove trees have prop roots that extend above the water. Which statement BEST explains the adaptive advantage of these roots?

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Question

A student studying mangrove ecosystems in Guyana observed that red mangrove trees have prop roots that extend above the water. Which statement BEST explains the adaptive advantage of these roots?

Accepted Answer

They provide structural support in soft mud and allow gas exchange in waterlogged soil — Award 1 mark for identifying both functions: structural support in unstable substrate AND gas exchange (obtaining oxygen) in anaerobic conditions. A is incorrect — roots do not perform photosynthesis. C is incorrect — prop roots do not serve as a defence against herbivores. D is incorrect — mangroves are adapted to excess water, not water storage for dry conditions.

Answer

They prevent herbivores from eating the leaves

Answer

They provide structural support in soft mud and allow gas exchange in waterlogged soil

Answer

They allow the plant to absorb more sunlight for photosynthesis

Answer

They store excess water during dry seasons

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