21. Early blight of potato spreads and becomes serious when the season begins with
22. Which of the following is a free living, nitrogen-fixing organism?
23. Which of the following is an example of rooted hydrophyte with floating leaves?
24. Common examples of the non-parasitic diseases include
25. Dry and scaly bracts found in association with spikelet infloroscence are known as
26. In case of severe infection of blast disease of rice, the plants wither at the
27. The portion of the earth in which ecosystems operate is called the
28. The megaspore mother cell nucleus after dividing meiotically forms four haploid megaspores which are arranged in a linear tetrad, of which the lower most megaspore is functional in case of
29. Which of the following methods is based on the act that tissue will not gain or lose water to the atmosphere when the vapour pressure of air corresponds to the water potential of the tissue?
30. Assertion (A) The lenticel is meant for gaseous exchange.
Reason (R) Lenticel checks excessive evaporation of water.
Reason (R) Lenticel checks excessive evaporation of water.
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- Plant Anatomy and Physiology - Section 1
- Plant Anatomy and Physiology - Section 2
- Plant Anatomy and Physiology - Section 3
- Plant Anatomy and Physiology - Section 4
- Plant Anatomy and Physiology - Section 5
- Plant Anatomy and Physiology - Section 6
- Plant Anatomy and Physiology - Section 7
- Plant Anatomy and Physiology - Section 9
- Plant Anatomy and Physiology - Section 10