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During differentiation of normal cells i...

During differentiation of normal cells into tracheary elements, the changes which occurs are

A

elongation of cells and oxidation of food

B

elongation of leaves and development of an elastic lignocellulosic secondary wall

C

elongation of cells and toxin accumulation

D

elongation of cells, loosing the protoplasm and development of a strong lignocellulosic secondary wall

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The correct Answer is:
D
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Assertion: During differentiation, cells undergo few to major structural changes both in their cell walls and protoplasm. To form a tracheary element, the cells would lose their protoplasm. They also develop a very strong, elastic, Ignocellulosw secondary cell walls, to carry water to long distances even under extreme tension.

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ARIHANT NEET-PLANT GROWTH AND DEVELOPMENT -CHAPTER EXERCISES (MEDICAL ENTRANCES GALLERY )
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  2. You are given a tissue with its potential for differentiation in an ar...

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  4. The Avena curvature is used for bioassay of

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  5. Identify the correct pair of combination (i) Zeatin - adenine deriva...

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  7. One hormone hastens maturity period in juvenile conifers, a second hor...

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  8. Which of the following statements regarding photoperiodism is false

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  9. One hormone stimulates the closure of stomata and another one influenc...

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  10. Which one is correct for blooming of short day plants

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  12. Which of the following is a dicot weedicide

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  13. A few normal seedlings of tomato were kept in a dark room. After few d...

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  18. Spraying sugarcane crop with a plant hormone increases length of plant...

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  19. Cells attaining their maximum size in terms of wall thickening and pro...

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  20. During seed germination its stored food is mobilised by

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  21. Movement of tendrils in response to touch is known as

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