81. The superficial layer of freshwater is constantly stirred by wind and is called
82. Between the Arctic ocean and polar ice-caps, and the forests to the south lies a band of treeless, wet, arctic grassland called the
83. Consider the following statements and choose the correct answer:
1. Both anaerobic respiration and alcoholic fermentation occurs in yeasts
2. Both anaerobic respiration and fermentation are extracellular
3. Fermentation takes place with zymase complex whereas anaerobic respiration takes place with a number of specific enzymes
4. In both, anaerobic respiration and fermentation, carbon dioxide is produced
1. Both anaerobic respiration and alcoholic fermentation occurs in yeasts
2. Both anaerobic respiration and fermentation are extracellular
3. Fermentation takes place with zymase complex whereas anaerobic respiration takes place with a number of specific enzymes
4. In both, anaerobic respiration and fermentation, carbon dioxide is produced
84. If cells are kept in some solution and the net result is that the cell swells up, then the solution is . . . . . . . .
85. Cloud's "demographic quotient" is expressed as
86. Which of the following has been firmly established as a true fruit-ripening hormone?
87. The biomass at any particular moment is called the
88. Phloem' in plants is mainly responsible for
89. Consider the following statements of Odum regarding the conditions that maintain biological energy flow in estuaries and choose the correct answer:
1. Tidal action that maintains a rapid removal of waste products of metabolism
2. A variety of plant species and life-forms that provide a continuous photosynthetic process
3. An estuary often functions as a nutrient trap
4. Close contact between autotrophic and heterotrophic layers
1. Tidal action that maintains a rapid removal of waste products of metabolism
2. A variety of plant species and life-forms that provide a continuous photosynthetic process
3. An estuary often functions as a nutrient trap
4. Close contact between autotrophic and heterotrophic layers
90. Which of the following is the most modern branch of ecology which is concerned with the analysis and understanding of the function and structure of ecosystem by the use of applied mathematics such as advanced statistical techniques, mathematical models and computer science?
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