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Our Environment - Ecosystems and Adaptations (Class IX)

Quiz covering ecosystem components, energy flow, food chains, ecological pyramids, plant and animal adaptations, and nutrient cycles

14 Questions Published
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Questions

Question 1 Multiple Choice (Single Answer)

Which of the following adaptations could be found in plants growing in dry climate?

(i) Sunken stomata
(ii) More stomata
(iii) Fewer stomata
(iv) Wide stomata

  1. Both (i) and (ii)
  2. Both (ii) and (iv)
  3. Both (i) and (iii)
  4. Both (i) and (iv)
Question 2 Multiple Choice (Single Answer)

Match the following columns:
Organism Role/Activity
a. Nitrosomonas 1. Nitrification
b. Nitrobacter 2. Denitrification
c. Pseudomonas 3. Ammonification
  1. a - 1, b - 2, c - 3
  2. a - 2, b - 3, c - 1
  3. a - 3, b - 1, c - 2
  4. a - 2, b - 1, c - 3
  5. a - 3, b - 2, c - 1
Question 3 Multiple Choice (Single Answer)

Which of the following is/are an abiotic component of an ecosystem?

  1. Green plants
  2. Water
  3. Human beings
  4. Goats
  5. Fish
Question 4 Multiple Choice (Single Answer)

Which of the following is/are not an aerial adaptation of a bird?

  1. Presence of strong flight muscles
  2. Presence of vertebral column
  3. Streamlined body
  4. Forelimbs modified into wings
Question 5 Multiple Choice (Single Answer)

The ten percent law, which was given by Raymond Linderman, is associated with the

  1. transfer of sun's energy to the producers
  2. transfer of ATP into the decomposers
  3. transfer of sun's energy to the consumers
  4. transfer of chemical energy from one organism to another
  5. transfer of heat energy to the community
Question 6 Multiple Choice (Single Answer)

An ecosystem must have a continuous external source of

  1. food
  2. minerals
  3. energy
  4. water
  5. sunlight
Question 7 Multiple Choice (Single Answer)

Which of the following adaptations is/are there in floating plants?

a. Poorly developed root hair
b. Thin and flexible stem
c. Long and thin leaves

  1. Only a
  2. Only b
  3. Only c
  4. Only a and b
  5. All of the above
Question 8 Multiple Choice (Single Answer)

The leguminous plants are important in agriculture because

  1. they need very little water to grow
  2. they are disease resistant
  3. they help in nitrogen fixation of the plants
  4. six crops of leguminous plants are harvested in a year
Question 9 Multiple Choice (Single Answer)

The food chain in which microorganisms break down the energy-rich compounds synthesised by producers is a

  1. detritus food chain
  2. predator food chain
  3. consumer food chain
  4. parasitic food chain
Question 10 Multiple Choice (Single Answer)

The pyramid of biomass is inverted in

  1. pond ecosystem
  2. grassland ecosystem
  3. forest ecosystem
  4. All of the above
Question 11 Multiple Choice (Single Answer)

The maximum amount of DDT accumulates in the body of which member of a food web?

  1. Phytoplankton
  2. Zooplankton
  3. Fish feeding on plankton
  4. Bird feeding on fish
Question 12 Multiple Choice (Single Answer)

Eutrophication leads to death of fish due to

  1. increased O2 content
  2. increased algae content
  3. decreased algae content
  4. decreased O2 content
Question 13 Multiple Choice (Single Answer)

Match the following adaptations of polar bear with their uses:
1. Blubber a. Camouflaging
2. Claw b. Acts as an insulator
3. White fur c. Acts as a rudder
4. Wide paws d. Walking on snow
  1. 1 - b, 2 - c, 3 - a, 4 - d
  2. 1 - b, 2 - d, 3 - a, 4 - c
  3. 1 - a, 2 - d, 3 - b, 4 - c
  4. 1 - d, 2 - b, 3 - a, 4 - c
  5. 1 - c, 2 - a, 3 - d, 4 - b
Question 14 Multiple Choice (Single Answer)

Which of the following elements has only sedimentary type of nutrient cycle?

  1. Carbon
  2. Hydrogen
  3. Nitrogen
  4. Phosphorus
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