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Forests Our Lifeline Test - 6

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Forests Our Lifeline Test - 6
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  • Question 1
    1 / -0
    Which of the following forest tree is used for medicinal purpose?
    Solution
    • Turmeric has some antioxidant and anti-inflammatory properties and basil is used for stomach spasms, loss of appetite, intestinal gas but they come under herbs, not a tree.
    • Oak is mainly used for furniture purposes as oak wood is exceedingly strong, heavy, and durable.
    • Neem tree has various medicinal properties such as antioxidant, anti-inflammatory, anti-diabetic, anticancer, antifungal, antiviral. 
    So, option A is the correct answer.
  • Question 2
    1 / -0
    What are the effects of deforestation?
    Solution
    • Deforestation is the cutting down of trees of the forest. Due to this, the number of trees that can consume CO$$_2$$ and give out oxygen through photosynthesis, decreases. 
    • Thus, there is an increase in atmospheric CO$$_2$$ levels. As the CO$$_2$$ level increases, the greenhouse effect starts. 
    • In this, CO$$_2$$ and other greenhouse gases, trap the heat of the sunlight and do not let it go. 
    • This raises the temperature of the Earth causing global warming.
    • The roots of the trees hold the soil particles. Therefore, without trees, the topsoil gets washed away by water and wind and causes soil erosion.

    Thus, the correct answer is option D.

  • Question 3
    1 / -0
    The image depicts which of the following activity?

    Solution
    • Deforestation is the permanent removal of trees to make room for something besides the forest. This can include clearing the land for agriculture or grazing or using the timber for fuel, construction, or manufacturing.
    • It effects the wildlife present in that habitat.
    So, option A is correct.
  • Question 4
    1 / -0
    What would happen if forest disappears?
    Solution
    Deforestation (disappearance of the forest) is when humans remove or clear large areas of forest lands and related ecosystems for non-forest use.
    • Without trees, rain runs off soil into rivers and streams i.e, soil erosion, raising the water level, leading to floods.
    • When deforestation takes place, it results in an increase in carbon dioxide concentration in the atmosphere, resulting in global warming.
    • If forests are destroyed, animals and other creatures of the forests will come out to human settlements searching for a place to stay. They will be killed more, thus leading to their extinction.
    So, the correct answer is option D.
  • Question 5
    1 / -0
    Which of the following helps in the formation of humus?
    Solution
    The micro-organisms which convert the dead plants and animals to humus are known as decomposers.
    Option "C" is correct.
  • Question 6
    1 / -0
    Leaves and branches are collectively known as
    Solution
    The branchy part of a tree above the stem is the region where leaves grow.
    Hence Leaves and branches are collectively known as Crown.
    Option "A" is correct.
  • Question 7
    1 / -0
    Which of the following type of crown is seen pine trees?
    Solution
    The conical shape keeps them from falling over in winter from too much snow present on the trees.
    Option A is correct.
  • Question 8
    1 / -0
    Which of the following can act as decomposers?
    Solution
    • Microorganisms such  as bacteria, protozoa and fungi act as decomposer.
    • They break down organic matter which is present in the bodies of dead and decaying matter and convert it into simple substance and mixed in the soil.
    • Lion, tiger and monkey are carnivorous animals.

    So, option D is the correct answer.
  • Question 9
    1 / -0
    The dead and decaying material present on the forest floor helps
    Solution

  • Question 10
    1 / -0
    Which part of the tree has leaf?
    Solution
    The branchy part of a tree above the stem is known as Crown. Leaves are formed in this region, Hence option "A" is correct.
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