SCIENCE
PLANT KINGDOM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a cell in the pollen grain in which the sperms are formed
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a cavity in the ovule in which pollen grains are stored after pollination
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an opening in the megagametophyte through which the pollen tube approaches the egg
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the microsporangium in which pollen grains develop
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Detailed explanation-1: -The space in the ovule where pollen grains are placed after pollination is known as the pollen chamber in gymnosperms. Within the pollen chamber, the generative cell nucleus divides into two gametic nuclei, and the cell of the tube lengthens to produce the pollen tube.
Detailed explanation-2: -Final answer: The pollen chambers present in gymnosperms represent a cavity in the ovule in which pollen grains are stored after pollination.
Detailed explanation-3: -Pollen-tube pathway During the pollination process of higher plants, after the pollen germinates on the stigmatic surface, a pollen tube is formed from the pollen and extends down the style into the ovule; nuclei from the pollen travels through the pollen tube to fertilize the ovule.
Detailed explanation-4: -Pollen germination and pollen tube growth are common to all seed plants, but these processes first developed in gymnosperms and still serve for their successful sexual reproduction.
Detailed explanation-5: -The pollen chamber in gymnosperms is a cavity in the ovule in which pollen grains are deposited after pollination. The generative cell nucleus separates within the pollen chamber to create two gametic nuclei and the cell of the tube elongates to form the pollen tube.