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Thorns , spines and prickles in plants w...

Thorns , spines and prickles in plants work as

A

Respiratory organs

B

Excretory organs

C

Organs of offense

D

Defensive organs

Text Solution

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The correct Answer is:
D
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[A] : Thorns may bear nodes and internodes in some plants. [R] : Thorns are modified stems as they arise in the axil of a leaf or at the apex a branch.

[A] : Thorns may bear nodes and internodes in some plants. [R] : Thorns are modified stems as they arise in the axil of a leaf or at the apex a branch.

AAKASH INSTITUTE ENGLISH-MORPHOLOGY OF FLOWERING PLANTS-SECTION-B OBJECTIVE TYPE QUESTIONS
  1. Which is not a modification of stem ?

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  2. Reticulate venation is the feature of dicots but some monocots also ex...

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  3. Thorns , spines and prickles in plants work as

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  4. Leaflet tendril and entire leaf tendril are found in respectively.

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  5. Select an incorrect match

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  6. Which of the following is not the modification of leaf?

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  7. Select a correct set.

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  8. Inflorescence with thick , fleshy axis and large-colored bract is

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  9. Bisexual sessile and bracteates flowers developing acropetally in

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  10. What type of inflorescence does the given figure show ?

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  11. Find the odd one (w.r.t. inflorescence axis elongation)

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  12. The type of inflorescence characterized by having dimorphic flower is

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  13. In Head or Capitulum inflorescence

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  14. Monoadelphous condition and pentacarpellary ovary are present in

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  15. A. Citrus and Ricinus have synandrous condition. B. In epitepalous c...

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  16. Presence of staminode is characteristic feature of

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  17. Match the following {:("Column I","Column II"),("a.Amphisarca","(i)A...

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  18. Find incorrect matching

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  19. Most common fruits of fabaceae and brassicaceae are respectively

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  20. In Coriandrum, the prolongation of thalamus beyond the carpel is calle...

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