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Assertion :- Environmental signals such ...

Assertion :- Environmental signals such as light and gravity also affect certain phases or stages of growth
Reason:- Gravity and light leads to differential auxin concentration which is responsible for differential growth.

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.

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The correct Answer is:
A
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Read the following statements and find out the INCORRECT statement. a. Plant growth is unique because plants retain the capacity for unlimited growth throughout their life. b. Growth, at a cellular level , is principally a consequence of the increase in the amount of protoplasm. c. One single maize root apical meristem can give rise to more than 3,50,00 new cells per hour , whereas cells in watermelon may increase in size by up to 17, 500 times. d. Environmental signals such as light , temperature and gravity also affect certain phases or stages of growth. e. In geometric growth, following mitotic cell division , only one daughter cell continues to divide while the other differentiates adn matures.

Assertion :- Growth is one of the part of plant development. Reason:- Development is overall process from birth to death and is sum of growth and differentiation.

Assertion :- Auxins help to prevent fruit and leaf drop at early stages. Reason:- In early stages auxins do not allow differentiation of abscission zone at the base of plant organs.

Assertion : Development is the sum of growth and differentiation. Reason : Development in plants is under the control of extrinstic factors only.

Assertion : Plants usually bend towards the source of light Reason :Shoot apex shows positive phototropism because of differential growth caused due to unequal distribution of auxin.

Assertion :- Beside growth, differentiation in plants is also open. Reason:- Cells/tissues arising out of the same meristem have different structure at maturity.

Assertion: Growth, differentiation and development are very closely related events in the life of a plant. Reason: Development in plants (i.e, both growth and differentiation) is under the control of intrinsic and extrinsic facotrs.

Distinct seasons and annual variation in precipitation leads to formation of major biomes. Reason:- Distinct seasons and annual variation in precipitation leads to development of different climatic conditions which favours growth and development differentially.

MOTION-PLANT GROWTH AND DEVELOPMENT-Exercise - 4
  1. Assertion :- A sigmoid curve is characteristic of plants growing in na...

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  2. Assertion :- Plant growth and development is intimately linked with th...

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  3. Assertion :- Environmental signals such as light and gravity also affe...

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  4. Assertion :- Oxygen is compulsory for growth Reason:- Oxygen is mus...

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  5. Assertion :- The act leading to maturation is known as differentiation...

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  6. Assertion :- Beside growth, differentiation in plants is also open. ...

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  7. Assertion :- Development is a broad and extensive aspect of the life o...

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  8. Assertion :- Buttercup produces two different kind of leaves within th...

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  9. Assertion :- Growth regulators are intrinsic and intercellular factors...

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  10. Assertion :- Auxins help to prevent fruit and leaf drop at early stage...

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  11. Assertion :- 2,4-D is one of the selective weedicide. Reason:- 2,4-...

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  12. Assertion :- GA3 is used to speed up the malting process in brewing in...

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  13. Assertion :- Spraying of gibberellin leads to early seed formation in ...

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  14. Assertion :- Kinetin is synthetic cytokinin. Reason:- Kinetin was o...

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  15. Assertion :- Cytokinins helps in the delay of leaf senescence. Reas...

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  16. Assertion :- Ethylene increases the yield of cucurbits. Reason:- Et...

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  17. Assertion :- ABA is stress hormone. Reason:- ABA causes abscission ...

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  18. Assertion :- In day neutral plants there is no correlation between exp...

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  19. Assertion :- Flowering in plants depends only on a combination of ligh...

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  20. Assertion :- LDPs without leaf are unable to flower. Reason:- Leave...

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