Biology
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.
Seeds
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Answer
A is True and R is False.
Reason — In hypogeal germination, the epicotyl elongates faster, causing the plumule to emerge while cotyledons stay underground.
In epigeal germination, it is the hypocotyl that elongates not the epicotyl, lifting the cotyledons above the soil.
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Related Questions
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): 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.
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.
Name the following:
(a) A monocotyledonous endospermic seed.
(b) A chemical used in experiments which absorbs oxygen.
(c) Part of the plumule above the embryonic axis of the seed.
(d) A plant which shows viviparous germination.
(e) The layer of endosperm of maize rich in protein.
(f) A seed with folded plumule leaves.