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Life Processes Test - 40

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Life Processes Test - 40
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Doctors measure the blood pressure with the instrument known as _______
    Solution
    The sphygmomanometer is a device used by doctors to measures the blood pressure of the patient. It measures the systolic and diastolic brachial artery pressure.
    So the correct answer is ' Sphygmomanometer'.

  • Question 2
    1 / -0
    Minerals absorbed by roots move to the leaf through:
    Solution
    • Upward movement of water and minerals from roots is achieved by xylem vessels that run like pipes throughout the root, stem, branches, and leaves. They form a continuous passage for water and nutrients to reach the leaf. 
    • Phloem is involved in the transportation of food. 
    • Mesophyll cells are involved in photosynthesis. 
    • Stomata are openings on the leaf surface through which the exchange of gases takes place. 
    • So, the correct answer is option A.
  • Question 3
    1 / -0
    Food is transported to various parts of the plant through
    Solution
    Transportation of food requires living tissue. Sieve tubes in phloem tissue are living cells and are involved in transportation of sugars.
  • Question 4
    1 / -0
    The transport of water and minerals takes place through:
    Solution
    The transport of water and mineral is done through the xylem tissue in the plants. The xylem tissue is a type of complex permanent tissue that contains more than one type of cell - vessels, tracheids, xylem parenchyma, and xylem fibres.
    So, the correct answer is option B.
  • Question 5
    1 / -0
    Which process is favoured by transpiration?
    Solution
    • The transpiration in plants leads to suction force in the xylem vessel.
    • The suction force is strong enough to pull the water from the root to the leaves.
    • This is called transpirational pull and can pull the water up to 100 m or more.
    • This force is responsible for the transport of water in tall trees.
    • Transpiration results in loss of water in vapour form. 
    • So, the correct answer is option B.
  • Question 6
    1 / -0
    Which of the following event is more rapid?
    Solution
    • The suction of water and minerals due to transpiration pull is more rapid because the water molecules have a great mutual attraction with each other or in other words, they have tremendous cohesive power.
    This process is a continuous process in the form of a column. 
    • Cyclosis is the movement of the cytoplasm. It depends on the movement of the cytoskeleton. It is fast but not faster than the movement due to transpiration.
    • Sugar transport is a bidirectional movement. The flow in phloem transports in bulk. Thus, it is slower.
    • Hormone distribution involves signalling mechanism. Due to this signalling mechanism is slower.
    Thus, the correct answer is option A. 
  • Question 7
    1 / -0
    Transpiration occurs through:
    Solution
    The loss of water in the form of vapour from the aerial parts/stomatal pores of a plant is called transpiration. Leaves, fruits, stems, flowers all being aerial parts of a plant are capable of carrying out transpiration. Hence, the correct answer is option 'D'.
  • Question 8
    1 / -0
    The plant undergoes wilting, when:
    Solution
    • Xylem tracheids and vessels are the most important tissues involved in the transport of water in plants. 
    • In case xylem is blocked, then water transport will be hindered. 
    • This will lead to the reduction or lack of water supply to the different parts of the plant. 
    • As a result the turgor pressure gradually reduces. This will lead to the loss of rigidity of cells and ultimately wilting.
    • So, the leaves will droop down or wilt, causing the entire plant to wilt and die. 
    • Thus, the correct answer is option A. 
  • Question 9
    1 / -0
    The exchange of gases (O$$_2$$ and CO$$_2$$) in humans takes place in:
    Solution
    • The oxygen in the inhaled air enters the body from the nostrils and via trachea and bronchi reaches the lungs. Inside the lungs, the bronchi branch into bronchioles. Through the bronchioles, the oxygen reaches their terminal swollen ends called the alveoli.
    • The oxygen readily diffuses from the alveoli into the blood flowing in the nearby capillaries. The carbon dioxide from the blood moves into the alveoli and thus, exchange of oxygen and carbon dioxide occurs.
    • So, the correct answer is option D.
  • Question 10
    1 / -0
    The conducting tissues of the plant are:
    Solution
    Xylem and phloem are specialized tissues found in vascular plants for transportation of water and prepared food respectively. 
    So, the correct answer is option C.
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