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CUET UG Ecology and Environment — practice questions

Explore 40 free Ecology and Environment questions in CUET UG Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Ecology and Environment questions and exercises with answers

Showing questions 1–30 of 40.

Which of these is a terrestrial ecosystem?Read the answer and worked solution →Which is a man-made ecosystem?Read the answer and worked solution →The basic energy input to any ecosystem is:Read the answer and worked solution →Green plants in an ecosystem are called:Read the answer and worked solution →Animals that feed directly on plants are:Read the answer and worked solution →Producers belong to which trophic level?Read the answer and worked solution →Energy movement through trophic levels is:Read the answer and worked solution →The rate of biomass production is called:Read the answer and worked solution →GPP minus respiration losses equals:Read the answer and worked solution →The rate at which consumers form new organic matter is:Read the answer and worked solution →The annual net primary productivity of the biosphere is about:Read the answer and worked solution →Raw material for decomposition is called:Read the answer and worked solution →Which is NOT a step of decomposition?Read the answer and worked solution →Plants capture what share of photosynthetically active radiation?Read the answer and worked solution →Decomposition is slower when detritus is rich in:Read the answer and worked solution →Which conditions favour decomposition?Read the answer and worked solution →The mass of living material at a trophic level is the:Read the answer and worked solution →The pyramid of biomass in the sea is generally:Read the answer and worked solution →Which ecological pyramid can never be inverted?Read the answer and worked solution →Which group is left out of ecological pyramids?Read the answer and worked solution →Animals that feed directly on plants are:Read the answer and worked solution →Which is NOT a step of decomposition?Read the answer and worked solution →Producers belong to which trophic level?Read the answer and worked solution →Energy movement through trophic levels is:Read the answer and worked solution →Plants capture what share of photosynthetically active radiation?Read the answer and worked solution →The basic energy input to any ecosystem is:Read the answer and worked solution →Green plants in an ecosystem are called:Read the answer and worked solution →GPP minus respiration losses equals:Read the answer and worked solution →The annual net primary productivity of the biosphere is about:Read the answer and worked solution →Raw material for decomposition is called:Read the answer and worked solution →

Worked practice questions

Which of these is a terrestrial ecosystem?

  1. A grassland
  2. A shallow pond
  3. A river mouth
  4. A large lake
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Correct answer: A. A grassland

1. Terrestrial ecosystems sit on land. 2. Ponds, lakes and estuaries are aquatic instead. 3. Forest, grassland and desert are terrestrial ecosystems. 4. So the answer is a grassland. _Source: syllabus Biology, Ch 12 'Ecosystem'_

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Which is a man-made ecosystem?

  1. A salt marsh
  2. A crop field
  3. A rainforest
  4. A wide river
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Correct answer: B. A crop field

1. Most ecosystems form without human help. 2. A few are built and maintained by people. 3. Crop fields and aquaria are man-made ecosystems. 4. So the answer is a crop field. _Source: syllabus Biology, Ch 12 'Ecosystem'_

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The basic energy input to any ecosystem is:

  1. Chemical fuel
  2. Nuclear power
  3. Solar energy
  4. Tidal energy
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Correct answer: C. Solar energy

1. Producers need a constant supply of energy. 2. They capture it by photosynthesis. 3. A constant input of solar energy sustains the ecosystem. 4. So the answer is solar energy. _Source: syllabus Biology, Ch 12 'Ecosystem'_

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