When Is the Polarity of a Plant Established

question 66

Multiple Choice

When is the polarity of a plant established?

• A) when the cotyledons form at the shoot end of the embryo
• B) when the shoot-root axis is established in the embryo
• C) when the primary root breaks through the seed coat
• D) when the shoot first breaks through the soil into the light as the seed germinates

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Definitions:

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