PLANTS
PLANT REPRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Pollen tubes form when (check all that apply)
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Pollen germinates
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Insects carry pollen to the stigma
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Enzymes digest through the style
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Pollen nucleus combines with egg nucleus
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The anther releases its pollen
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Explanation:
Detailed explanation-1: -Above the ovary, the style represents a support structure to which the stigma is attached at the top of the pistil. The stigma receives the male gametes contained within the pollen and releases a chemical signal causing a specialized cell within the pollen grain to form the pollen tube.
Detailed explanation-2: -Style is not present inside the pollen tube. They help in the transportation of male gametes from pollen grains (from stigma in flowering plants) to the ovules. Ovules are present at the base of the pistil in the ovary.
Detailed explanation-3: -New findings reveal the unexpected role of an enzyme called KATANIN in guiding the growth of pollen tubes in flowering plants.
There is 1 question to complete.