Biology
Assertion (A): The single cotyledon of maize grain is termed as hilum which does not store any food material for the developing embryo.
Reason (R) Hilum is located in the embryonic region of the maize grain.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Seeds
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Answer
Both A and R are False.
Reason — The single cotyledon in a maize grain is called the scutellum, not hilum. It plays a role in the absorption of nutrients from the endosperm during germination.
Hilum and micropyle are not visible in maize grain.
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Related Questions
Assertion (A): Dicotyledonous seeds are always exalbuminous (non-endospermic).
Reason (R): All dicotyledonous seeds contain two cotyledons which store food material for the developing embryo.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): Micropyle is the opening through which the pollen tube enters the ovule.
Reason (R): Micropyle helps in the diffusion of respiratory gases for the growing embryo.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Assertion (A): Epicotyl of the embryonic axis elongates faster in hypogeal germination.
Reason (R): Epicotyl of the embryonic axis elongates faster in epigeal germination and the cotyledons remain underground.
- A is True and R is False.
- A is False and R is True.
- Both A and R are True.
- Both A and R are False.
Correct the following false statements by changing the first/last word only.
(a) Plumule develops into the root system.
(b) Testa is the thin inner layer of the seed coat.
(c) Endothelium separates the endosperm and embryonic region in the maize grain.
(d) Hypocotyl elongates faster in hypogeal germination.
(e) Germination is the period of rest in a seed.