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Ecosystems BIOLOGY - Ecosystems

Rajasthan Board (RBSE) - STD 12 Science - BIOLOGY (Rajasthan - English Medium). 584 questions in this chapter.

Question types

Ecosystems question types

584 questions across 5 question groups — pick any mix to generate a BIOLOGY paper with step-by-step answer keys.

584
Questions
5
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 1M.C.Q (1 Marks)1 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 3M.C.Q (1 Marks)1 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 5M.C.Q (1 Marks)1 Mark
An ecosystem is a:
  • A
    Group of components that interact with one another.
  • B
    Group of interacting species in one place at one time.
  • ✓
    Biological community and component of the physical environment with which the community interacts.
  • D
    Group of interacting chemicals and their cycles.

Answer: C.

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Q 71 Marks Question1 Mark
Which one of the following has the largest population in a food chain?
  • A
    Producers.
  • B
    Primary consumers.
  • C
    Secondary consumers.
  • ✓
    Decomposers.

Answer: D.

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