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Leaf fall occurs in a tree when there is...

Leaf fall occurs in a tree when there is increase in concentration of

A

abscissic acid

B

auxin

C

gibberellins

D

cytokinins

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The correct Answer is:
A
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TRUEMAN BIOLOGY-PLANT GROWTH AND DEVELOPMENT AND PLANT MOVEMENTS -MULTIPLE CHOICE QUESTIONS
  1. Pruning of plants promotes branchin becaues the axillary buds get sen...

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  2. Gibberlline was first extracted from

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  3. Leaf fall occurs in a tree when there is increase in concentration of

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  4. Gibberellins can promote seed germination because of their influence o...

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  5. Touch me not belongs to

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  6. Tendrils exhibit/twining of tendrils is due to

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  7. Match list -(Plant hormones' ) with List -II (Typical physiological ef...

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  8. Plants normally flowering in winter remain vegetative in summer even i...

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  9. Which of the following statements are correct? 1.Gibberellins can su...

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  10. Match list -I List-II and select the correct answer using the codes gi...

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  11. The shoot branching depends upon the development of axillary buds but ...

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  12. Consider the following statements 1. In climacteric fruits, ethylene...

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  13. Which one does not exhibit seed dormancy ?

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  14. Which of the following plant hormones is correctly matched with its fu...

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  15. A long day plant with critical day length of 14 hrs will flower under ...

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  16. Go through the following matches (i) Auxins - Tryptophan (ii) Et...

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  17. Read the following matches (i) Auxins - Promotes abscission of olde...

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  18. Go through the following matches (i) Cytokinis- Inhibits secondary ...

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  19. Go through the following statements (i) The most widely used compoun...

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  20. Go through the following matches (i) Abcisic acid - Delays senesce...

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