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Assertion : Nutrients are required by pl...

Assertion : Nutrients are required by plants for the synthesis of protoplasm and act as source of energy.
Reason : Water provides the medium for enzymatic activities needed for growth.

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Assertion : If you burn a plant , its nitrogen component is given off as ammonia and other gases . Reason : Hydroponics does not allow plants to grow well if they are supplied with all the mineral nutrients they need.

Assertion(A): A catalyst speed up a reaction but does not participate in its mechanism. Reason(R): A catalyst provides an alternative path of lower activation energy to the reactants.

Assertion : Photorespiration is a useful process where there is no synthesis of ATP energy. Reason : RuBisCO is present in mesophyll cells of C_(4) plants, hence they show more productivity.

Assertion : One of the most important traditional uses of sacred groves was that they acted as a repository for various ayurvediv medicines. Reason : In modern times , sacred groves have become biodiversity rich areas, as they provide refuge to various plant and animal species of conservation significance. (a) If both assertion and reason are true and reason is the correct explanation of assertion. (b) If both assertion and reason are true but reason is not the correct explanation of assertion. (c) If assertion is true but reason is false. (d) If both assertion and reason are false.

Assertion : Hydrophily constitues a major mode of pollination in most of the aquatic angiospermous plants. Reason : Almost all the aquatic dicot and monocot plants require water for the transport of male gametes and for fertilisation.

Water provides the medium for enzymatic activites needed for growth while oxygen helps in releasing metabolic energy essential for growth activities.

ALLEN-PLANT GROWTH AND DEVELOPMENT-True and False
  1. The leaves, flowers and fruits of the same tree not only have limited ...

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  2. Development of a mature plant a zygote (ferilized egg) follow a precis...

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  3. Read the following statements and find out the INCORRECT statement. ...

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  4. Choose the correct or incorrect statement regarding given figure: ...

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  5. Water provides the medium for enzymatic activites needed for growth wh...

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  6. Assertion : Nutrients are required by plants for the synthesis of prot...

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  7. Auxin (IAA) was first isolated from

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  8. Spraying juvenile conifers with GA hastens the maturity period thus le...

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  9. Kinetin occur naturally in plants.

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  10. Natural cyitokinins are sytnhesised in regions where rapid cell diviso...

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  11. Ethylene is used to initiate flowering and for synchorinising fruit se...

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  12. Ethephon hastens fruit ripening in tomatoes and apples and accelerates...

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  13. ABA plays an important role in seed development, maturation and dorman...

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  14. Events like vernalization, flowering dormancy, seed germination and pl...

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  15. In certain plants relative duration of light and dark period plays a i...

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  16. Assertion : Vernalisation is the promotion of flowering by a period of...

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  17. Some varieties of wheat are known as spring wheat while others are cal...

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  18. Bennials are monocarpic plants that normally flower and die in the sec...

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  19. Effect of vernalisation can not be seen in sugarbeet, cabbages and car...

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  20. Winter varieties of annual plants are planted in autumn, they germinat...

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