Biology
Fill in the blanks:
(a) In bean seeds, …………… grows faster and the seeds are brought …………… ground.
(b) …………… is a protective layer of radicle and …………… protects the rolled plumule.
(c) A seed is protected by …………… and…………….
(d) Seeds absorb water through …………… which also helps in diffusion of respiratory gases.
(e) Rice, wheat and maize are rich in …………… food.
Seeds
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Answer
(a) In bean seeds, hypocotyl grows faster and the seeds are brought above ground.
(b) Coleorhiza is a protective layer of radicle and coleoptile protects the rolled plumule.
(c) A seed is protected by testa and tegmen.
(d) Seeds absorb water through micropyle which also helps in diffusion of respiratory gases.
(e) Rice, wheat and maize are rich in starch food.
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Related Questions
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.
Given below is the longitudinal section of a maize grain. Match the structures marked (a) to (e) with their correct functions/characteristics.
Example: (f)-6: Separates the endosperm and the embryonic part.
Arrange the following set of terms in order, so as to be in logical sequence. Rewrite the correct order.
- Embryo, 1st male gamete, zygote, egg cell, micropyle.
- Zygote, embryo, seed, allogamy, fusion of gametes.
- Tegmen, Embryonic axis, Cotyledons, Testa
(arrange with respect to their position in a seed from outer to inner).