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Life Processes Test - 75

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Life Processes Test - 75
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Weekly Quiz Competition
  • Question 1
    1 / -0
    The bean shaped cells of the stomata are known as
    Solution
    A stoma (stomata) is a tiny opening or pore that is used for gas exchange. They are found on the under-surface of plant leaves. Each stoma remains surrounded by two kidneys or bean shaped epidermal cells the guard cells. 
    These adjust the size of the opening by opening or closing.
    Air enters the plant through these openings. Also, water vapor goes into the atmosphere through these pores in transpiration. 
    So, the answer is A.

  • Question 2
    1 / -0
    The function of part labelled as C is:

    Solution
    • The part labeled as C in the given image is the urinary bladder. It is a muscular sac-like structure located in the lower abdomen
    •  It collects and acts as a temporary storehouse for urine.
    • It allows urination to be infrequent and controllable.
    • So, the correct answer is option B - 'Storage of urine'.
  • Question 3
    1 / -0
    Choose the correct function of lymph.
    Solution
    Correct Option: D
    Explanation:

    • Lymph carries oxygen, hormones and nutrients to all parts of the body.
    • It transports antibodies and lymphocytes into the blood.
    • It maintains the composition of tissue fluid and the volume of blood.
    • It drains excess fluid present between the cells to the blood.
    • It prevents invasion of microbes and foreign substances inside the lymph nodes.

    Hence, the correct functions of lymph are carries digested and absorbed fat from the intestine and drains excess fluid from extra cellular space back into the blood.
  • Question 4
    1 / -0
    The part labelled as A in the given image helps in the

    Solution
    The part labeled as A in the given image is Kidney. The nephron is the structural and functional unit of the kidney. Nephron performs four functions filtration, reabsorption, secretion, and excretion by which the kidney helps in removal of waste from the blood. Hence Kidney helps in removal of waste from the blood.
    So, the correct answer is 'Removal of waste from the kidney'.
  • Question 5
    1 / -0
    A leaf has labeled as A  has 20 stomata. A leaf labeled as B has 10 stomata. Which of the following statement defines the percentage of water vapour released by both the leaves?
    Solution
    The number of stomata alone cannot decide the percentage of water vapour released. Certain other factors like their opening and closing or their location on the leaf as well as the temperature and light conditions determine the release of water vapour by stomata.
    Stomata present in the lower epidermis are mostly in shade so they cause less evaporation.
    So the correct answer is 'None of the above'.
  • Question 6
    1 / -0
    Which among the following carries oxygen to different parts of the body?
    Solution
    Blood contains RBCs, which have hemoglobin, a protein which transports oxygen to different parts of body.  As blood traverses through the body, the hemoglobin releases oxygen.
    So, the correct option is C.
  • Question 7
    1 / -0
    Which of the following helps in the release of water vapour in the plant?
    Solution
    Stomata are the openings present on the aerial parts of the plants that are responsible for the exchange of gases and water vapour with the atmosphere. Stomata release water vapour into the atmosphere in the process of transpiration.
    So, the correct answer is option A.
  • Question 8
    1 / -0
    Which of the following statement proves that guard cell is a living cell?
    Solution
    Stomata is surrounded by two highly specialized guard cells. Guard cells have cytoplasmic inclusions in the nucleus, chloroplasts, starch grains, mitochondria, endoplasmic reticulum, Golgi apparatus, and ribosomes. Hence, they are living cells. They regulate the rate of transpiration by opening and closing the stomata.  Thus, the correct answer is option D.
  • Question 9
    1 / -0
    What is true about vein?
    Solution
    Veins are the blood vessels that bring blood from different body parts back to the heart. 
    All veins carry deoxygenated blood except pulmonary vein which carries oxygenated blood from lungs to the left atrium of the heart. 
    Small vessels called venules which continue from capillaries, merge to form veins and drain the blood from capillaries into veins.
    So, the correct answer is option C- 'They carry blood from organs towards heart'.
  • Question 10
    1 / -0
    Which one indicates hypertension
    Solution
    During hypertension systolic and diastolic rate both becomes higher than 120/80.
    So, the correct answer is A.
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