Which of the following is true about the Digestion Efficiency (DE)-(assimilation/consumption) and Ecological Efficiency (EE) (production/consumption) of ectotherms and endotherms? (1) Endotherms have a high DE and ectotherms have a […]
Blog
CSIR NET Life Science Previous Year Questions and Solution on Ecology
What Is Lindeman’s Efficiency? Understanding the Formula and Its Components
Lindeman’s efficiency between trophic levels is depicted by the formula: Efficiency = A/B Where, A and B, respectively are: (1) ‘assimilation at trophic level n’ and ‘assimilation at trophic level […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Comparing Aquatic and Terrestrial Ecosystems: Trophic Levels, Productivity, and Herbivore Efficiency
Which of the following set of observations is true with reference to a comparison of aquatic (A) and terrestrial (T) ecosystems? (1) Number of trophic levels is more in A […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
How to Calculate Energy Flow Values in Trophic Levels Using Percentages
The diagram below depicts energy flow within a single trophic level, where l-amount ingested, NA= amount not assimilated, R=respiration, and Pn = biomass production at trophic level. Which one of […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Why Are Aquatic Ecosystems More Productive and Efficient Than Terrestrial Ones?
Autotrophs in the aquatic ecosystem, unlike their counterparts in the terrestrial ecosystem are mostly microscopic and very low in indigestible (to the herbivores) matter. This explains the fact that compared […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
How to Match Net Primary Production:Biomass (P:B) Ratios to Ecosystems
The approximate P:B (Net Primary Production: Biomass) ratios in four different ecosystems (A, B, C, D) are A – 0.29; B – 0.042, C – 16.48; D – 8.2. The […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Where Is Herbivore Utilization Efficiency Highest? Comparing Ocean Plankton, Forests, and Grasslands
The utilization or consumption efficiency of herbivores is highest in (1) plankton communities of ocean waters. (2) mature temperate forests. (3) managed grasslands. (4) managed rangelands. Introduction Herbivore utilization […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Why Does More Energy Flow to Herbivores in the Open Ocean Than in Forests?
A much greater proportion of energy fixed by autotrophs is transferred to the herbivore level in the open ocean ecosystem than in a forest ecosystem because (1) aquatic autotrophs are […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
What Is the Correct Order for the Rate of Decomposition of Litter Constituents?
Which of the following is the correct decreasing order for the rate of decomposition of litter constituents? (1) Hemicellulose, cellulose, lignin, phenol (2) Cellulose, hemicellulose, phenol, lignin (3) Hemicellulose, cellulose, […]
CSIR NET Life Science Previous Year Questions and Solution on Ecology
Which Factors Contribute to Ecosystem Stability? Understanding the Role of Omnivores and Food Web Structure
Which of the following is likely to contribute to the stability of an ecosystem? (1) High number of specialists (2) Fewer number of functional links (3) More omnivores (4) Linear […]
