Question:
The mature seeds of plants such as gram and peas, possess no endosperm, because
The mature seeds of plants such as gram and peas, possess no endosperm, because
Updated On: Jul 7, 2022
- these plants are not angiosperms
- there is no double fertilisation in them
- endosperm is not formed in them
- endosperm gets used up by the developing embryo during seed development
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The Correct Option is D
Solution and Explanation
Majority of dicot seeds (e.g., pea, gram, bean, mustard, groundnut) and a few monocot seeds (e.g., orchids, Sagittaria), are called nonendospermic or exalbuminous seeds because the endosperm is consumed during seed development and the food is stored in cotyledons and other regions.
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Concepts Used:
Seed
The matured and fertilized ovule, which comprises an active embryo reserve food and protective coating, is referred to as a seed. Seeds are ripened ovules that contain an embryonic plant with sufficient reserve food for embryo development. Ovules evolve into seeds after fertilization.
Types of Seed:
- Monocotyledonous seeds: Seeds having only one cotyledon, called monocotyledonous seeds.
- Dicotyledonous seeds: Seeds with two cotyledons, called dicotyledonous seeds.
- Albuminous seeds: Seeds having an endosperm. These seeds have thin membrane cotyledons and endosperm that hold on and feed the seedling during its early growth.
- Exalbuminous seeds: Food gathers in the endosperm tissue of exalbuminous seeds early in development, but it is utilized by the growing embryo and mature seeds without endosperm.