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UPSC CDS Soil & Vegetation — practice questions — page 4

Explore 120 free Soil & Vegetation questions in UPSC CDS Environment. Open each question or exercise to read its content, reference answers and available explanation.

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Soil & Vegetation questions and exercises with answers

Showing questions 91–120 of 120.

Forests are called green lungs because plants release oxygen through:Read the answer and worked solution →The branchy part of a tree above the stem is the:Read the answer and worked solution →The roof-like cover formed by branches of tall trees over other plants is the:Read the answer and worked solution →The horizontal layers created by trees of different crown heights are called:Read the answer and worked solution →The lowest layer of a forest is formed by:Read the answer and worked solution →In the food chain grass, insects, frog, snake, the top consumer is the:Read the answer and worked solution →Microorganisms that convert dead plants and animals into humus are:Read the answer and worked solution →The dark coloured substance formed from dead plant and animal tissue is:Read the answer and worked solution →Dead animals in a forest become food for jackals, insects, crows and:Read the answer and worked solution →Forests help maintain the balance of oxygen and which gas in the atmosphere?Read the answer and worked solution →Trees return water to the air through their leaves by:Read the answer and worked solution →Forest officers can recognise the presence of animals by their footprints and:Read the answer and worked solution →Seedlings sprouting from a heap of animal dung show that animals help forests by:Read the answer and worked solution →In a forest, rain does not hit the ground directly because the canopy:Read the answer and worked solution →Forests act as natural absorbers of rainwater and so help maintain the:Read the answer and worked solution →Without trees, heavy rain hitting the ground directly may cause:Read the answer and worked solution →Roots of trees protect soil by:Read the answer and worked solution →Villagers near a forest enjoy less noise pollution because the forest:Read the answer and worked solution →Tibu's village and its fields were created by clearing forest about how many years ago?Read the answer and worked solution →The forest near Tibu's village is not regenerating because of indiscriminate felling and:Read the answer and worked solution →Which forest trees did Tibu help the children identify?Read the answer and worked solution →People of tribes living in forests have traditional knowledge about:Read the answer and worked solution →Catch the forest treesRead the answer and worked solution →Pop the forest productsRead the answer and worked solution →Run the forest chainRead the answer and worked solution →Slice the forest wordsRead the answer and worked solution →Plant or animalRead the answer and worked solution →Sort layers, cycles and servicesRead the answer and worked solution →Type the numberRead the answer and worked solution →Forests bingoRead the answer and worked solution →

Worked practice questions

Forests are called green lungs because plants release oxygen through:

  1. Photosynthesis
  2. Respiration
  3. Transpiration
  4. Decomposition
Show answer and solution

Correct answer: A. Photosynthesis

1. Plants make food using sunlight. 2. Photosynthesis releases oxygen. 3. Forests balance oxygen and carbon dioxide. _Source: syllabus Science, Chapter 17, Forests: Our Lifeline._

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The branchy part of a tree above the stem is the:

  1. Root
  2. Crown
  3. Canopy
  4. Trunk
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Correct answer: B. Crown

1. Trees have crowns of different shapes. 2. The branchy top is the crown. 3. Crowns together form the canopy. _Source: syllabus Science, Chapter 17, Forests: Our Lifeline._

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The roof-like cover formed by branches of tall trees over other plants is the:

  1. Canopy
  2. Crown
  3. Humus
  4. Floor
Show answer and solution

Correct answer: A. Canopy

1. Look up in a forest and the branches form a roof. 2. This is the canopy. 3. It intercepts falling rain. _Source: syllabus Science, Chapter 17, Forests: Our Lifeline._

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