Orchid seeds are tiny, with virtually no endosperm and with miniscule cotyledons. If such seeds are deposited in a dark, moist environment, then which of the following represents the most likely means by which fungi might assist in seed germination, given what the seeds lack?

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Quizplus · Accepted Answer

Since orchid seeds have miniscule cotyledons and virtually no endosperm, they lack the resources to grow on their own. Therefore, fungi that form a mutualistic relationship with the orchid can provide organic nutrients that the orchid seeds need in order to germinate and grow. These fungi absorb nutrients from their environment and can provide these nutrients to the orchid seeds in exchange for carbohydrates produced by the orchids through photosynthesis.

Orchid Seeds Are Tiny, with Virtually No Endosperm and with Miniscule