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Living Organisms - Characteristics and Habitats Test 6

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Living Organisms - Characteristics and Habitats Test 6
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  • Question 1
    1 / -0
    The adaptations of desert plants include
    Solution
    Desert plants are adapted to survive in conditions where water is scarce. They have long and deep roots. The stem has a waxy covering to prevent water loss. Leaves are often absent or reduced to spines and photosynthesis is usually performed by the stem.
    Hence the correct option is D.
  • Question 2
    1 / -0
    Which of the following have long, hollow and light stems?
    Solution
    The stems of some aquatic plants are long, hollow and light. The stems grow up to the surface of water while the leaves and flowers, float on the surface of water.
    Thus, the correct answer is option B.
  • Question 3
    1 / -0
    Reduced role of roots is seen in plants living in
    Solution
    In terrestrial plants, roots normally play a very important role in the absorption of nutrients and water from the soil. However, in aquatic plants, roots are much reduced in size and their main function is to hold the plant in place.
    Hence the correct option is C.
  • Question 4
    1 / -0
    Leaves of aquatic plants
    Solution
    The leaves of some aquatic plants float on the surface of water. However some aquatic plants are completely submerged and all parts are beneath the surface of water.
    Hence the correct option is C.
  • Question 5
    1 / -0
    Which of these is a characteristic of aquatic plants?
    Solution
    • Aquatic plants often have small roots and long slender stems with leaves floating on the surface of the water. However, some aquatic plants are completely submerged.
    • Hydrophytes have small roots because minerals and gases which are needed for respiration and photosynthesis are dissolved in the surrounding water and thin, flexible stems make floating and moving in the water easy. 
    • Reduced transpiration and long deep roots are characteristics of desert plants.
    • Needle shaped leaves are seen in plants found in mountains.

    Hence, the correct option is A.
  • Question 6
    1 / -0
    Which of the following have long, hollow and light stems?
    Solution
    The stems of some aquatic plants are long, hollow and light. The stems grow up to the surface of water while the leaves and flowers, float on the surface of water.
    Hence the correct option is B.
  • Question 7
    1 / -0
    A teacher tells her students that the roots of a particular plant are short and do not have much significance. The plant she is talking about is likely to be found in
    Solution
    In terrestrial plants, roots normally play a very important role in the absorption of nutrients and water from the soil. However, in aquatic plants, roots are much reduced in size and their main
    function is to hold the plant in place.
    Hence the correct option is C
  • Question 8
    1 / -0
    Aquatic plants have
    Solution
    The roots of aquatic plants are small sized and help only in holding the plant in place.
    Needle shaped leaves are seen in mountain plants.
    Waxy covering over stem is seen in plants living in the desert.
    Hence the correct option is A.
  • Question 9
    1 / -0
    Thin ribbon like leaves are characteristic of plants seen in
    Solution
    Some aquatic plants are submerged in water. All parts of such plants are under water. Some of these plants have narrow and thin ribbon-like leaves. These can bend in the flowing water. In some submerged plants, leaves are often highly divided, through which the water can easily flow without damaging them.
    Hence the correct option is D.
  • Question 10
    1 / -0
    Which of the following is not a non- living object?
    Solution
    Mushroom is a fungi and is a living saprophytic organism. Chair, bus and stones are non living objects. 
    Hence the correct option is D.
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