21. Consider the following statements regarding the symptoms of wilt of arhar and choose the correct answer:
1. The susceptible plants are attacked when young - about five to six weeks old
2. The first symptom is the premature yellowing of the leaves
3. The leaves appear to be affected progressively from the bottom towards the top
4. Sudden wilting is rare
1. The susceptible plants are attacked when young - about five to six weeks old
2. The first symptom is the premature yellowing of the leaves
3. The leaves appear to be affected progressively from the bottom towards the top
4. Sudden wilting is rare
22. Auxanometers have been devised to measure
23. In which of the following genera both micropylar and chalazal endosperm haustoria are found?
24. In India, typical halophytic vegetation is represented by
25. In a mature ovule the egg-apparatus is composed of
26. Consider the following statements and choose the correct answer:
1. The carbon, nitrogen and various cycles in nature operate to conserve the limited amount of usable matter on the earth
2. The flow of energy is both cyclic and one-way
3. The transfer of energy through a biological community begins when the energy of sunlight is fixed in a green plant by photosynthesis
4. It is estimated that only 8 percent of the energy of the sun reaching the planet strikes green plants and that only 2 percent of this is utilized in photosynthesis
1. The carbon, nitrogen and various cycles in nature operate to conserve the limited amount of usable matter on the earth
2. The flow of energy is both cyclic and one-way
3. The transfer of energy through a biological community begins when the energy of sunlight is fixed in a green plant by photosynthesis
4. It is estimated that only 8 percent of the energy of the sun reaching the planet strikes green plants and that only 2 percent of this is utilized in photosynthesis
27. The vegetation with vertical gradient of gradually decreasing temperature from the surface is known as
28. The adsorption of water by a confined imbibant develops
29. According to Melchers grafting experiments, which of the following plant parts responds initially to cold treatment?
30. The first visual symptoms of red-rot of sugarcane appear
Read More Section(Plant Anatomy and Physiology)
Each Section contains maximum 100 MCQs question on Plant Anatomy and Physiology. To get more questions visit other sections.
- 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 7
- Plant Anatomy and Physiology - Section 8
- Plant Anatomy and Physiology - Section 9
- Plant Anatomy and Physiology - Section 10