Question
Medium
Solving time: 3 mins
Assertion: Formation of nucellar endosperm occurs by subsequent nuclear division without wall formation.
Reason: Coconut is an example of such endosperm, where the endosperm remains nuclear throughout the development of the fruit.
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The division of the primary endosperm nucleus and a few subsequent nuclear division are not accompanied by wall formation in nucellar type of endosperm. So numerous nuclei freely suspended in its sap. In coconut, the primary endosperm nucleus undergoes a number of free nuclear divisions. When the fruit is about 50 mm long before the embryo sac gets filled with a clear fluid in which float numerous nuclei of various sizes. At a later stage the suspension shows in addition to free nuclei, several cells each enclosing variable number of nuclei.
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Question Text | Assertion: Formation of nucellar endosperm occurs by subsequent nuclear division without wall formation. Reason: Coconut is an example of such endosperm, where the endosperm remains nuclear throughout the development of the fruit. |
Topic | Sexual Reproduction in Flowering Plants |
Subject | Biology |
Class | Class 12 |
Answer Type | Text solution:1 |
Upvotes | 61 |