A. Photosynthesis
B. Assimilation of nitrogenous compounds
C. Chemosynthesis
D. Digestion or breakdown of organic compounds
Correct Answer: Digestion or breakdown of organic compounds ✔
Last Updated: May 16, 2024
Related MCQs
- In an ecosystem in abiotic components which of the following occurs?
- Ecosystem contains:
- In natural ecosystem, decomposers include:
- To eat and being eaten relationship is called:
- Which of the following ecosystem has highest gross primary productivity:
- The living organisms of all ecosystems collectively constitute:
- The pyramid of number around a tree would be:
- Which is the most stable ecosystem?
- The number of individuals of a species in a particular ecosystem at a given constant due to:
- Biological equilibrium is found among the:
- In an ecosystem, bacteria are considered as:
- In a biotic community, primary consumers are:
- The rate at which light energy is converted into chemical energy of organic molecules is the ecosystem’s:
- In desert grasslands, which type of animals are relatively more abundant?
- In which of the following there is no difference?
- Which one of the following elements is the critical limiting factors in the function of ecosphere because of its irretrievable loss in the ocear:
- Which one of the following pairs is a sedimentary type of biogeochemical cycle?
- The transfer of energy from one trophic level to another is governed by the 2nd law of thermodynamics. The average efficiency of energy transfer from herbivores to carnivores is:
- One of the major difficulties in the biological control of insect pests is that:
- Niche of a species in an ecosystem refers to its:
- Energy transfer from one trophic level to other in a food chain is:
- Ecosystem receives nitrogen from outside through:
- If we completely remove the decomposers from an ecosystem, its functioning will be adversely affected because:
- Mark the incorrect statement with reference to carbon cycle:
- The sulphate rocks are formed in ocean by leaching of:
- Hydrological cycle is under the control of:
- The maximum amount of CO2 fixed by green plants by way of photosynthesis in a year is:
- According to Odum the light absorbed by the plant cover in terms of kcal/m2/day is:
- The SO2 is returned to the atmosphere by:
- Which of the following serves as source of carbon in plants:
- Mark the correct statement with reference to phosphorous cycle:
- Which ecological cycle is directly driven by sunlight?
- Sulphur is returned to the soil by:
- The percentage of water bound in lithosphere and sedimentary rocks is:
- The rate of storage at consumer level is:
- According to Lindemann, the percentage of net production passed on to carnivores is:
- In a sugarcane field the net productivity in terms of kg/m2/year, is:
- In a forest ecosystem, the numerical relationship between the producers and herbivores:
- The gross production minus losses in an ecosystem is indicated as:
- The term homeostasis in an ecosystem refers to:
- The term omnivore is applied to:
- The solar radiations are the sole source of:
- The pyramid of biomass in a parasitic ecosystem is:
- The ecological pyramids were first designed by:
- An ecosystem is a structure that is:
- Which of the following belong to the same trophic level?
- According to Lindemann, the total solar input in terms of gcal/cm2/year is:
- The efficiency of primary production in an ocean is:
- From gross production of autotrophs, according to Lindemann, how much energy in gcal/cm2/year is used in respiration and decomposition respectively:
- The pyramid of biomass in a forest ecosystem is:
- The cybernetics of an ecosystem refers to: