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List three reasons why multicellular plants require specialized transport systems.
A
- Size: Diffusion is too fast for distances over a few millimetres.
- SA:V Ratio: Ratio is too high to supply internal cells from the outer surface.
- Metabolic Rate: Low demand for sugars/minerals in specific areas like meristems.
B
- Size: Diffusion is too slow only for distances over a few metres.
- SA:V Ratio: Ratio is too low to supply external cells from the inner surface.
- Metabolic Rate: High demand for sugars/minerals equally throughout the plant.
C
- Size: Active transport is too slow for distances over a few millimetres.
- SA:V Ratio: Ratio is too low to supply internal cells from the outer surface.
- Metabolic Rate: High demand for oxygen/carbon dioxide in specific areas like meristems.
D
- Size: Diffusion is too slow for distances over a few millimetres.
- SA:V Ratio: Ratio is too low to supply internal cells from the outer surface.
- Metabolic Rate: High demand for sugars/minerals in specific areas like meristems.
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Transport in plants Flashcards
26 flashcards on OCR A A Level Biology Transport in plants: the key terms, definitions and processes you need to recall for Biological processes, Biological diversity and Unified biology (Components 01-03).