71. The plants that are capable of fixing nitrogen directly from the atmosphere include
72. Perfectly even flow, in which water particles move parallel to one another, is called
73. North Indian upper alluvial savannah is also known as
74. Which of the following imparts black stripes running down the rocks of some hills and indicates thereby the type of algal vegetation?
75. An element present in Chlorophyll is
76. Two guanosine triphosphate (GTP) molecules are generated in the Krebs cycle via the reaction
77. When the diseased stem of sugarcane is splitted open during the early stages ofthe red-rot disease.
78. Which of the following countries has the highest number of livestock in the world although their productivity is very poor?
79. Consider the following statements regarding the germination of pollen grain and choose the correct answer:
1. The content of the pollen is a true male gametophyte
2. The pollen tube comes out due to the protrusion of the exine through the germ pore
3. When the pollen grain has germinated, the pollen tube penetrates the stigma through the stigmatic papillae
4. Some stigmas have a continuous cuticle in which pollen tubes penetrate by enzyme action
1. The content of the pollen is a true male gametophyte
2. The pollen tube comes out due to the protrusion of the exine through the germ pore
3. When the pollen grain has germinated, the pollen tube penetrates the stigma through the stigmatic papillae
4. Some stigmas have a continuous cuticle in which pollen tubes penetrate by enzyme action
80. Savannah forest of Burma is also known as
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- Plant Anatomy and Physiology - Section 10