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The germination where epicotyl elongates...

The germination where epicotyl elongates and becomes curved keeping the cotyledons underground is known as

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Region just above the cotyledons.
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On fusion of a mixture of Na-2CO_3 and CaCO_3 with silica at 1500^@C , a liquid consisting of silicatees of sdium and calcium is formed. On cooling . Liquid become viscous and eventually ceasesto flow . It becomes solid and is known as flass. By varying the proportions of the three basic ingredients and by adding other substances, the properties of glass can be altered, Glass can be represented as R_2 O. MO.6SiO_2 , where R= Na or K, M = CaBa, Zn or pbSiO_2 may be replaced by Akl_2 O_3 , b_2 O_3 or P_2 O_5 . Colourd glasses are obtained by adding certain metallic oxdes or salts in the fused mass, Glass is attached by HF and this property is used to make marking on the galss , This is known as etching . The glass on rapid coolling becomes brittle and fragile . The artciles of glass are cooled neither slowly nor very rapidly . The process of graducal cooling of flass iscalled annealing . Annealing is .

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ICSE-SEED DORMANCY-REVIEW QUESTIONS (IV Very Short Answer Type Questions (with answers))
  1. What is the term used for suspension of growth before germination due ...

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  2. What is the term used for suspension of growth before germination due ...

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  3. Which growth inhibitor is responsible for seed dormancy?

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  4. What is scratching of seed coat to break seed dormancy called ?

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  5. The term used for initial uptake of water by a dehydrated seed

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  6. Name the hormone an active embryo secretes.

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  7. Which enzyme is synthesised in the aleurone layer of seed during activ...

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  8. Which hormone induces seed dormancy?

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  9. Cotyledons are pushed above the soil in which germination?

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  10. Which part of the cotyledon grows rapidly in epigeal germination?

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  11. The germination where epicotyl elongates and becomes curved keeping th...

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  12. Give an example of hypogeal germination

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  13. Give 2 examples of epigeal germination.

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  14. Give 2 examples of hypogealgermination.

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  15. What type of germination do Rhizophora plant show?

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  16. If the seed germinates within a fruit, what is it called?

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  17. Name a term used for gradual declining of activity of plant, leading t...

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  18. When leaves stand at right angle to next upper and lower pair , then t...

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  19. What kind of senescence does banana plant show?

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  20. Name of process by which leaves , fruits of a plant shed ?.

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