Which organism is an example of a secondary consumer?
A frog is a secondary consumer as it feeds on primary consumers like insects.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Ecosystem Services and Functions
#trophic levels
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Which of the following statements about trophic levels is incorrect?
Carnivores do not belong to the second trophic level; they are secondary or tertiary consumers.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Ecosystem Services and Functions
Which of the following organisms is NOT a detritivore?
Grasshoppers are herbivores, not detritivores. Detritivores, such as earthworms, fungi, and bacteria, decompose dead organic matter.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Ecosystem Services and Functions
Which of the following statements about energy transfer in food chains is incorrect?
Consumers gain less energy than producers due to energy loss at each trophic level.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Ecosystem Services and Functions
Which of the following best explains why energy transfer between trophic levels is inefficient?
Energy transfer is inefficient because most energy is lost as heat due to metabolic activities, limiting the amount transferred to the next level.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Ecosystem Services and Functions
Which ecological concept explains the loss of energy at each trophic level?
The second law of thermodynamics states that energy is lost as heat at each trophic level, making energy transfer inefficient.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Ecosystem Services and Functions
Which of the following statements about trophic levels is correct?
Herbivores are primary consumers that feed on producers and occupy the second trophic level.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Ecosystem Services and Functions
Which trophic level do secondary consumers occupy in a food chain?
Secondary consumers occupy the third trophic level in a food chain, feeding on primary consumers.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Nutrient Cycling - Carbon Phosphorus and Ecological Succession
Which of the following best describes an ecological pyramid?
Ecological pyramids represent the relative number, biomass, or energy of organisms at different trophic levels in an ecosystem.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Nutrient Cycling - Carbon Phosphorus and Ecological Succession
Which of the following is an incorrect statement about trophic levels?
Carnivores do not belong to the first trophic level; they are secondary or tertiary consumers.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Energy Flow - Food Chains Food Webs Trophic Levels
Which trophic level does a secondary consumer occupy in a grazing food chain?
Secondary consumers feed on primary consumers and occupy the third trophic level in a grazing food chain.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Energy Flow - Food Chains Food Webs Trophic Levels
Which of the following statements about energy flow in an ecosystem is incorrect?
Energy transfer between trophic levels is not 100% efficient; most energy is lost as heat.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Energy Flow - Food Chains Food Webs Trophic Levels