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Grass leaves curl inwards during very dr...

Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following:

A

Closure of stomata

B

Flaccidity of bulliform cells

C

Shrinkage of air spaces in spongy meso- phyll

D

Tyloses in vessels

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TRUEMAN BIOLOGY-NEET (UG) -2019 (Conducted by CBSE on 05-05-2019)-MCQs
  1. The Earth Summit held in Rio de Janeiro in 1992 was called :

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  2. DNA precipitation out of a mixture of biomolecules can be achieved by ...

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  3. Grass leaves curl inwards during very dry weather. Select the most app...

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  4. Match the following structures with the their respective location in o...

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  5. Match the following hormones with the respective disease

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  6. Which of the following contraceptive methods Involve a role of horrnon...

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  7. Drug called 'Heroin' is synthesized by

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  8. In a species, the weight of newborn ranges form 2 to 5 kg. 97% of the ...

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  9. Conversion of glucose to glucose-6-phosphate, the first irreversible r...

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  10. Which of the following statements is correct?

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  11. Which of the following' ecological pyramids is generally inverted?

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  12. Consider the following statements: (A) Coenzyme or metal ion that i...

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  13. Due to increasing air-borne allergens a pollutants, many people in urb...

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  14. Which one of the following statements regarding post-fertilization de...

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  15. Phloem in gymnosperms lacks :

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  16. It takes very long time for pineapple plants to produce flowers. Which...

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  17. Persistent nucellus in the seed is known as

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  18. Cells in G0 phase :

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  19. Match Column -I with Column -II

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  20. What would be the heart rate of a person if the cardiac output is 5 L,...

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