CBSE Questions for Class 7 Biology Forests Our Lifeline Quiz 2 - MCQExams.com

The top part of trees in forest is called 
  • Canopy
  • Crown
  • Understorey
  • Tindall effect
Which of the following is a natural habitat?
  • Forest
  • Zoo
  • Aquarium
  • None of the above
The most rapidly depleting resource in the world is 
  • Water
  • Forest
  • Wind
  • Sunlight
Which of the following will be affected due to the absence of forest?
  • Food and shelter of animals
  • Percentage of carbon dioxide
  • Percentage of oxygen
  • All of the above
Which of the following forest tree is used for medicinal purpose?
  • Neem
  • Oak
  • Turmeric
  • Basil
What are the effects of deforestation?
  • Increase in the temperature of the Earth
  • Increase in the soil erosion
  • Increase in the CO$$_2$$ level of atmosphere
  • All of the above
The image depicts which of the following activity?
635743_45b1d22b7e84468b823c31d2ca2ea995.jpg
  • Deforestation
  • Aforestation
  • Flood
  • Both A and B
What would happen if forest disappears?
  • Flood
  • Global warming
  • Extinction of animals
  • All of the above
Which of the following provides nutrients to the seedling to grow in forest ?
  • Grubs
  • Beetles
  • Bacteria
  • Decaying animals dung
Leaves and branches are collectively known as
  • Crown
  • Trunk
  • Root
  • None of the above
Which of the following can act as decomposers?
  • Lion
  • Tiger
  • Monkey
  • Fungi
Which part of the tree has leaf?
  • Crown
  • Trunk
  • Root
  • None of the above
The dead and decaying material present on the forest floor helps
  • To increase fertility of the soil
  • To increase the carbon dioxide concentration
  • To increase the oxygen concentration
  • All of the above
Which of the following can be traced at the forest floor?
  • Humus
  • Herbs
  • Birds
  • Both A and B
Humus can increase the 
  • Soil fertility
  • Water supply
  • Minerals
  • None of the above
Which of the following helps in the formation of humus?
  • Plants
  • Animals
  • Decomposers
  • None of the above
The decomposers in the forest perform 
  • Production of the plants
  • Decomposition of the dead plants and animals
  • Breakdown of the forests
  • All of the above
Which of the following plant helps to prepare medicine?
  • Amla
  • Neem
  • Tulsi
  • All of the above
Which of the forest layer shown in the diagram receives the maximum sunlight?
635878_4947ac26e7d8476d964b31beee2ad8c2.jpg
  • Emergent layer
  • Canopy layer
  • Understorey layer
  • All of the above
The microorganisms which convert dead and decay matter into humus are called
  • Carnivores
  • Omnivores
  • Decomposers
  • None of the above
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