What Flower Mechanism Would Help Prevent Pollination by a Foreign

question 72

Multiple Choice

What flower mechanism would help prevent pollination by a foreign plant species?

• A) A pollen tube only grows inside the style of its own species.
• B) The stigma is sticky mainly to its own species of pollen.
• C) The timing of flowering keeps pollinators moving among a limited number of species.
• D) Flowers attract a small number of specialized pollinators and, therefore, pollen is not spread equally to all available species of flowers.
• E) All of the answer choices help prevent pollination by a foreign species.

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