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CUET UG Ecology and Environment — practice questions — page 2

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 31–40 of 40.

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 →Which is a man-made ecosystem?Read the answer and worked solution →Which of these is a terrestrial ecosystem?Read the answer and worked solution →The rate of biomass production is called:Read the answer and worked solution →The rate at which consumers form new organic matter is:Read the answer and worked solution →

Worked practice questions

Decomposition is slower when detritus is rich in:

  1. Nitrogen and salt
  2. Starch and sugar
  3. Lignin and chitin
  4. Sugars and water
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Correct answer: C. Lignin and chitin

1. Chemical composition of detritus sets the pace. 2. Nitrogen and soluble sugars speed decomposition up. 3. Lignin and chitin slow it down. 4. So the answer is lignin and chitin. _Source: syllabus Biology, Ch 12 'Ecosystem'_

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Which conditions favour decomposition?

  1. Cold and moist
  2. Warm and frozen
  3. Cold and anoxic
  4. Warm and moist
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Correct answer: D. Warm and moist

1. Soil microbes drive the process. 2. Low temperature and anaerobiosis inhibit them. 3. A warm and moist environment favours decomposition. 4. So the answer is warm and moist. _Source: syllabus Biology, Ch 12 'Ecosystem'_

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The mass of living material at a trophic level is the:

  1. Standing crop
  2. Standing state
  3. Trophic level
  4. Primary yield
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Correct answer: A. Standing crop

1. Each level holds a certain mass at any moment. 2. It is measured as biomass or as numbers per unit area. 3. That mass is called the standing crop. 4. So the answer is the standing crop. _Source: syllabus Biology, Ch 12 'Ecosystem'_

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