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Ecosystems BIOLOGY - Ecosystems

Maharashtra Board - STD 12 Science - BIOLOGY (MSBSHSE - English Medium). 619 questions in this chapter.

Question types

Ecosystems question types

619 questions across 7 question groups — pick any mix to generate a BIOLOGY paper with step-by-step answer keys.

619
Questions
7
Question groups
5
Question types
Sample Questions

Ecosystems questions

One sample from each question group in this chapter. Select any group above to see the full set with answer keys.

Q 1MCQ1 Mark
An ecosystem which can be easily damaged but can recover after some time if damaging effect stops, will be having.
  • ✓
    Low stability and high resilience.
  • B
    High stability and low resilience.
  • C
    Low stability and low resilience.
  • D
    High stability and high resilience.

Answer: A.

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Q 2MCQ1 Mark
In plant succession, last community is called as:
  • A
    Ecotone
  • ✓
    Climax community
  • C
    Seral community
  • D
    Ecosystem

Answer: B.

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Q 3MCQ1 Mark
Two different species cannot live for long duration in the same niche or habitat. This law is.
  • A
    Allen’s law.
  • ✓
    Gause’s hypothesis.
  • C
    Dollo’srule.
  • D
    Weismann’s theory.

Answer: B.

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Q 4MCQ1 Mark
The primary succession in a sere is a:
  • A
    Sub sere
  • B
    Meso sere
  • ✓
    Pioneer sere
  • D
    None of the above

Answer: C.

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Q 5MCQ1 Mark
Which of the following is free$-$living aerobic non$-$photosynthetic nitrogen$-$fixing bacte$-$ rium?
  • A
    Rhizobium.
  • ✓
    Azotobacter.
  • C
    Nostoc.
  • D
    Azospirillum.

Answer: B.

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Q 27Answer the following questions in detail.5 Marks
Jeremy went to a butcher's shop with his father and saw that the goats before slaughter were fed on grasses and was fascinated to see the sequence of organism through which the food passes. On seeing his fascination his father asked him the reason and he quickly explained him the concept of food chain.
  1. Describe food chain.
  2. Grass was eaten by goat which in turn is consumed by humans. Explain their relation.
  3. Name different types of food chains.
  4. What values are shown by Jeremy?
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Q 29Answer the following questions in detail.5 Marks
Arun visited his grandfather's farm and noticed that one of the workers was introducing earthworms in the soil. He quickly rushed to his grandfather and asked him the reason. His grandfather explained him the advantages of earthworm in soil improvement.
  1. Why are earthworms also known as detritivores?
  2. Explain fragmentation.
  3. Name the steps in the process of decomposition.
  4. What values are shown by Arun?
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Q 32True-False1 Mark
In an ecological pyramid, the amount of energy available at the lower trophic level is always more than that at a higher trophic level.
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