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Tracheilds do not collapse under extreme...

Tracheilds do not collapse under extreme tension due to the presence of

A

a) Strong, elastic lignocellulosic secondary cell wall

B

b) Thick, cellulosic primary cell wall

C

c) Thin, elastic, cellulosic primary cell wall

D

d) Thick, hard subsidized secondary cell wall

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The correct Answer is:
A
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AAKASH INSTITUTE ENGLISH-PLANT GROWTH AND DEVELOPMENT-ASSIGNMENT (SECTION - A)
  1. Which abiotic factor is not essential for early growth of the plant bu...

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  2. Which factor determines the direction of movement of main root and ste...

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  3. Tracheilds do not collapse under extreme tension due to the presence o...

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  4. Cork, secondary cortex and secondary xylem are formed through

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  5. Which of the following is formed after dedifferentiation?

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  6. Plant growth regulators (PGRs) are

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  7. The ability of a plant to follow different pathways and produce differ...

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  8. Heterophylly means

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  9. Which type of phytohormone is made up of indole compounds?

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  10. Two synthetic auxins are

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  11. Which phytohormone promotes falling of old leaves whereas inhibits fal...

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  12. Which auxins are used in producing seedless fruits?

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  13. Which of the following auxin is widely used as weedicide?

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  14. Which of the following is not a function of gibberellic acid?

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  15. Apical dominance is stimulated by auxin whereas it is inhibited by

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  16. Phytohormones resposible for cell division in callus are and .

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  17. Which phytohormoes is synthesised in ripened fruits?

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  18. Which of the following is incorrect about ethylene?

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  19. Select a correct match

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  20. Which of the following phytohormone is a derivative of carotenoids?

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