71. Which of the following seems the most appropriate energy level responsible for electron transfer in the reduction of a chemical acceptor and the initiation of the electron flow for ATP production?
72. Which of the following act as antisenescent hormones in leaves?
73. What is the impact of advancing glaciers on the rings of trees?
74. There is a loss of enzyme activity when denaturation of proteins occurs at a temperature ranging between
75. When an organ grows at an intermediate angle i.e. between 0° to 90° or between 90° to 180° from the vertical, it is said to be
76. The seeds of certain plants fail to germinate, if they do not pass through the digestive tract of fruit-eating birds. This is due to
77. Consider the following statements regarding recurrent type apomixis and choose the correct answer:
1. There is meiosis during the formation of megaspore
2. The embryo sac is diploid in nature
3. The embryo sac never develops from a cell of the archesporium
4. The development of embryo from a cell of an embryo sac other than egg is known as apospory
1. There is meiosis during the formation of megaspore
2. The embryo sac is diploid in nature
3. The embryo sac never develops from a cell of the archesporium
4. The development of embryo from a cell of an embryo sac other than egg is known as apospory
78. Each biome blends with the next through a fairly broad transition region known as
79. Consider the following statements and choose the correct answer:
1. The immediate precursor of gibberellin is the diterpene kaurene
2. The gibberellins are compounds consisting of the ent-gibberellane skeleton or ent-20 norgibberellane
3.The gibberellins are easily inter-convertible in the organism by changes in the hydroxyl substitutions
1. The immediate precursor of gibberellin is the diterpene kaurene
2. The gibberellins are compounds consisting of the ent-gibberellane skeleton or ent-20 norgibberellane
3.The gibberellins are easily inter-convertible in the organism by changes in the hydroxyl substitutions
80. Total soil-moisture stress represents
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- Plant Anatomy and Physiology - Section 2
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- Plant Anatomy and Physiology - Section 6
- Plant Anatomy and Physiology - Section 7
- Plant Anatomy and Physiology - Section 8
- Plant Anatomy and Physiology - Section 9
- Plant Anatomy and Physiology - Section 10