Question

Name the part of the seed that provides nutrition for the growing dicot seedling.

• A. Plumule
• B. Micropyle
• C. Aleurone layer
• D. Cotyledon

Answer 1

The correct option is D Cotyledon

The cotyledons of the seed in several dicots provide nutrition for the growing seedling or the embryo. In dicots, the cotyledons have endosperm that provides nourishment only in the young seeds and are absent in the mature seeds. The endosperm is remobilized into the developing cotyledon which functions as the storage tissues. Hence, they are called non-endospermic or exalbuminous seeds. Castor seeds have endosperm even in the mature seeds and are an exception.

Monocotyledonous seeds are endospermic and provide nutrition to the embryo.
The plumule is the embryonic axis that grows into the shoot.
Micropyle is a small opening that is found in the seed and was part of the ovule. It helps in the absorption of water at the time of germination.
The aleurone layer is the outermost layer of the endosperm in a monocot seed and is proteinaceous in nature. It provides nourishment to the growing embryo of the seed.