NEET Foundation-Zoology-Ecology and Enviroment-Test-2 July 19, 2017admin0 Comments CategoriesEcology Environment NEET Foundation-Zoology-Ecology and Enviroment-Test-2 1. Primary productivity depends on Plant species of particular area Environmental factors Available nutrients and photosynthetic capacities of plants All the above 2. The rate of production of orgnic matter of an ecosystem during photosynthesis is NPP GPP Primary productivity Secondary productivity 3. Mark the incorrect match Primary productivity – Varies in different types of ecosystems GPP – Available biomass for the consumption to herbivores 55 billion tons – Annual NPP of oceans Secondary productivity-Rate of formation of new organic matter by consumers 4. Gross primary productivity minus respiration losses of an ecosystem is Primary productivity Net productivity Net primary productivity Secondary productivity 5. Food webs in the eocystem are formed due to Independency Interdependency Both (1) and (2) None 6. The available biomass for the consumption to heterotrophs is called Gross primary productivity (G P P) Net primary productivity (N P P) Primary productivity (P P) Secondary productivity (S P) 7. The rate of production of new organic matter at consumer level from existing is called GPP NPP SP PP 8. Net Primary Productivity (NPP) is given by the formula NPP = GPP x 100 NPP = GDP – Secondary productivity NPP = GPP – respiration rate NPP = GPP/100 9. Gross primary productivity is Rate at which organic molecules are formed in an autotroph Rate at which organic molecules are used up by an autotroph Storage of organic molecules in the body of an autotroph Rate at which organic molecules are transferred to next higher trophic level 10. A process of breakdown of organic matter by decomposers into inorganic substances is called NPP Productivity G PP Decomposition 11. The raw material for decomposition, the detritus includes Dead plant remains Dead remains of animals Fecal matter All the above 12. The various steps in decomposition are Fragmentation Leaching and catabolism Humification and mineralization All the above 13. Break down of detritus into small particles is called Fragmentation Leaching Catabolism Humification 14. Process of water soluble nutrients go down into the soil horizon and get precipitated as unavailable salts is called Fragmentation Leaching Catabolism Humification 15. Degradation of detritus into simple inorganic substances by the enzymatic action of bacteria and fungi is called Fragmentation Leaching Catabolism Humification 16. Decomposition is largely A non oxygenic process An oxygen requiring process A rapid process Both (1) and ( 17. The rate of decompostion is controlled by Chemical composition of detritus Climatic factors Both (1) and (2) None 18. Rate of decomposition is slower if detritus is rich in Lignin and nitrogen Chitin and sugars Nitrogen and sugars Lignin and chitin 19. The most important climatic factors that regulate decomposition through their effects on the activites of soil microbes are Temperature only Soil moisture only Temperature and soil moisture None 20. Which is not true for humus? Dark coloured amorphous substance Highly resistant to microbial action Act as reservoir of nutrients and increases water holding capacity of soil They are degradation product of proteins and fats and are produced by the process of mineralization Loading … Related posts: NEET Foundation-Zoology-Ecology and Enviroment-Test-1 NEET Foundation-Zoology-Ecology and Environment Test-3 NEET Foundation-Zoology-Ecology and Environment Test-8 NEET Foundation-Zoology-Ecology and Environment Test-9 NEET Foundation-Zoology-Ecology and Environment Test-11 Powered by YARPP.