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Transportation in Plants and Animals Test - 7

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Transportation in Plants and Animals Test - 7
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  • Question 1
    1 / -0
    From which part of a plant does maximum loss of water through transpiration take place?
    Solution
    From stomata, maximum loss of water through transpiration take place.Transpiration is essentially evaporation of water from plant leaves.
  • Question 2
    1 / -0
    Which of the following is observed when a plant cell is kept in saline water?
    Solution
    Option (1) is the correct answer.
  • Question 3
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    Which of the following helps in the bidirectional translocation of minerals?
    Solution
    Phloem helps in the bidirectional translocation of minerals.It consists of: conducting cells, generally called sieve elements; parenchyma cells, including both specialized companion cells or albuminous cells and unspecialized cells; and supportive cells, such as fibres and sclereids.
  • Question 4
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    Which of the following is not a function of transpiration?
    Solution
    Excretion of sap is not a function of transpiration. Rest all options are its functions.
  • Question 5
    1 / -0
    Which of the following is a function of hairs present on the leaf surface?
    Solution
    The function of hairs present on the leaf surface is to reduce transpiration.They are also known as Trichomes.
  • Question 6
    1 / -0
    Which of the following causes plasmolysis?
    Solution
    Exosmosis causes plasmolysis. It is due to outward movement of water from cell.
  • Question 7
    1 / -0
    The blood does not clot because of
    Solution
    Thrombocytes are the blood cells whose function is to stop bleeding.
  • Question 8
    1 / -0
    Mammalian erythrocytes have short life span due to absence of
    Solution
    Mammalian erythrocytes have short life span due to absence of nucleus.
  • Question 9
    1 / -0
    Blood pressure is measured by an instrument called
    Solution
    Blood pressure is measured by an instrument called sphygmomanometer. It is composed of an inflatable cuff to restrict blood flow and a mercury or mechanical manometer to measure the pressure.
  • Question 10
    1 / -0
    Blood clotting cannot take place in the absence of
    Solution
    Blood clotting cannot take place in the absence of vitamin k. It is an important factor in clotting cascade.
  • Question 11
    1 / -0
    In adult humans, red blood cells are produced in the
    Solution
    In adult humans, red blood cells are produced in the bone marrow in the heads of long bones in a process known as hematopoiesis.
  • Question 12
    1 / -0
    Red blood cells of which of the following mammals possesse nucleus?
    Solution
    Red blood cells of camel possesses nucleus. Camels have to live without food and water for a long time. So, their red blood cells have to divide and form new cells. Only nucleated cells can divide.
  • Question 13
    1 / -0
    Heart of man is
    Solution
    Heart of man is myogenic. Myogenic contraction refers to a contraction initiated by the myocyte cell itself instead of an outside occurrence or stimulus such as nerve innervation.
  • Question 14
    1 / -0
    Heart of a fish is special because
    Solution
    Heart of a fish is special because it has venous blood only as they have a closed-loop circulatory system.
  • Question 15
    1 / -0
    If the vagus branch of frog is stimulated, the heart beat will
    Solution
    If the vagus branch of frog is stimulated, the heart beat willI be decreased due to its parasympathetic action.
  • Question 16
    1 / -0
    The opening of truncus arteriosus in frog is guarded by
    Solution
    The opening of truncus arteriosus in frog is guarded by three semilunar valves.
  • Question 17
    1 / -0
    Bicuspid valves are present in between
    Solution
    Bicuspid valves are present in between left atrium and left ventricle.It has two cusps, or leaflets,the anteromedial leaflet and the posterolateral leaflet that guard the opening.
  • Question 18
    1 / -0
    Tricuspid valves are present in between
    Solution
    Tricuspid valves are present in between right atrium and right ventricle. The function of the valve is to prevent back flow of blood into the right atrium.
  • Question 19
    1 / -0
    Heart beat is heard on left side as
    Solution
    Heart beat is heard on left side as aorta is on left side.
  • Question 20
    1 / -0
    Which of the following has the thickest walls?
    Solution
    Left ventricle has the thickest walls, as it has to pump the blood to whole body.
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