The transfer of energy in a food chain is always:
  • Unidirectional
  • Methane
  • Bi-directional
  • Random
Which of these organisms are the most important decomposers in an ecosystem?
  • Algae and fungi
  • Fungi and bacteria
  • Algae and bacteria
  • Bacteria and virus
Which of these does not belong to biotic component?
  • Parasites
  • Fungi
  • Bacteria
  • Soil
Which of the following is always at the second trophic level of the food chains
  • Autotrophs
  • Herbivores
  • Carnivores
  • Decomposers
Which of the following is  not a terrestrial ecosystem?
  • Forest
  • Grassland
  • Desert
  • Aquarium
Excessive exposure of humans to U V-rays results in (i) damage to immune system (ii) skin cancer (iii) damage to lungs (iv) peptic ulcers
  • (ii) and (iv)
  • (i) and (iii)
  • (iii) and (iv)
  • (i) and (ii)
If a rats is eaten by a snakes, then the energy transfer will be from
  • producer to decomposer
  • producer to primary consumer
  • secondary consumer to primary consumer
  • primary consumer to secondary consumer
The first conference on Ozone layer was held in
  • 1987
  • 1990
  • 1986
  • 2000
Arrange the below according to the trophic level Fish, Zooplankton, Seal, Phytoplankton
  • Zooplankton -> fish -> Phytoplankton -> seal
  • Phytoplankton -> fish -> Zooplankton -> seal
  • Zooplankton -> Phytoplankton -> fish -> seal
  • Phytoplankton -> Zooplankton -> fish -> seal
What are the various steps of food chain called
  • Food chain levels
  • Tropic levels
  • Trophic levels
  • None of these
Which of the statement is incorrect?
  • Green plants get their food from organic compounds
  • All green plants and blue green algae are producers
  • Plants convert solar energy into chemical energy
  • Producers prepare their own food from inorganic compounds
Which of the following belongs to same trophic levels= (i) Insects (ii) Algae (iii) Spider (iv) Snakes (v) Frog
  • (i) and (ii)
  • (i) and (iii)
  • (iii) and (iv)
  • (iii) and (v)
which of these is not ODS?
  • CFCs
  • Halons
  • Nitrous Oxide
  • HFC
What will happen if deer is missing in the food chain given below? Grass → Deer → Tiger
  • The population of tiger decreases and the population of grass increases
  • Tiger will start eating grass
  • The population of tiger increases
  • The population of grass decreases
Which of the following limits the number of trophic levels in a food chain?
  • insufficient food supply
  • Polluted air
  • water
  • Decrease in energy at higher trophic levels
Ten percent law was given by
  • Lindeman
  • Darwin
  • Mendel
  • Morgan
Match the column
our-environment-class10-mcq-2.png
  • p -> iv, q -> i, r ->ii, s -> iii
  • P -> i, q -> i, r ->iv, s -> iii
  • P -> iv, q -> ii, r ->i, s -> iii
  • P -> ii, q ->iv, r ->i, s -> iii
In the below food chain,5 J  of energy was available to Hawks. How much would have been present in plants Plants -> Rats -> Snakes -> Hawks
  • 50 J
  • 5 J
  • 500 J
  • 5000 J
Amount of energy transferred from one trophic level to the next is
  • 1%
  • 10%
  • 20%
  • 2%
Match the column
our-environment-class10-mcq-1.png
  • p ->(i) , q ->(ii), r -> (i) , s- > (ii)
  • p ->(i) , q ->(i), r -> (ii) , s- > (ii)
  • p ->(ii) , q ->(ii), r -> (ii) , s- > (i)
  • p ->(ii) , q ->(ii), r -> (i) , s- > (i)
0 h : 0 m : 1 s

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