Which of the following is NOT a function of decomposers?
Decomposers do not perform photosynthesis; they break down dead organic matter and recycle nutrients.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors
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Which of the following statements about food chains is correct?
Energy is lost as heat at each trophic level, following the second law of thermodynamics.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors
Which component of an ecosystem converts inorganic substances into organic material using sunlight?
Autotrophs, such as green plants and algae, convert inorganic substances into organic matter using sunlight through photosynthesis.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors
Which of the following best describes the process of leaching in decomposition?
Leaching involves the removal of water-soluble inorganic nutrients, which move downward in the soil and sometimes become unavailable to plants.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors
Which of the following factors affects the rate of decomposition?
Temperature and soil moisture significantly influence microbial activity and the rate of decomposition.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors
Which of the following is an example of an organism found in the detritus food chain?
Earthworms play a crucial role in the detritus food chain by breaking down organic matter and facilitating decomposition.
Ref: NCERT Class 12 Biology Chapter 12: Ecosystem Decomposition - Process and Factors
Which of the following is an incorrect statement about invasive species?
Invasive species can significantly impact ecosystem dynamics by disrupting food chains and reducing biodiversity.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Adaptations - Morphological Physiological Behavioural
Which of the following statements about energy flow in an ecosystem is incorrect?
Energy transfer is not 100% efficient; only about 10% of energy is passed from one trophic level to the next.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Adaptations - Morphological Physiological Behavioural
Which of the following is an incorrect statement about keystone species?
Keystone species are not necessarily the most abundant but play a crucial role in maintaining ecosystem structure.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Adaptations - Morphological Physiological Behavioural
Which of the following statements about habitat destruction is correct?
Habitat destruction is a leading cause of biodiversity loss, as it reduces available resources and disrupts ecosystems.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Adaptations - Morphological Physiological Behavioural
Which of the following is NOT an adaptation of prey to avoid predators?
Increased reproduction rate helps populations survive but does not directly protect individual prey from predators.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Adaptations - Morphological Physiological Behavioural
Which of the following is a correct statement about ecosystem resilience?
Ecological resilience is the ability of an ecosystem to recover from disturbances and maintain its functions.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Adaptations - Morphological Physiological Behavioural