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Biology 9 Online
OpenStudy (anonymous):

Can you please tell me what is a sink ?

OpenStudy (trancenova):

Okay, So there are sources and sinks. A source is where something comes from (for example carbohydrates come from the leaves of a plant when it does photosynthesis) and a sink is where it 'pools' or collects - a sink for carbohydrates might be a rhizome (underground root) or a potato.

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