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Control and Coordination Test -12

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Control and Coordination Test -12
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Weekly Quiz Competition
  • Question 1
    1 / -0

    Adrenal can be called as the stress managing glands of the body.The above statement is

    Solution

    Adrenaline hormone is released in case of stress or emergency situation to normalise the functioning of body system.

  • Question 2
    1 / -0

    What is Phytochrome ?

    Solution

    Phytochrome is a blue-green plant pigment which regulates plant development, including seed germination stem growth, leaf expansion, pigment synthesis, and flowering. 

  • Question 3
    1 / -0

    ‘Tongue  receptor’ is the receptor responsible for

    Solution

    The receptors present on tongue is responsible for detecting taste of different kinds of foods that we eat.

  • Question 4
    1 / -0

    Which one of the following is involved in reflex action?

    Solution

    Reflex action mainly controlled by spinal chord as it is rapid, involuntary action in response to a specific stimulus.

  • Question 5
    1 / -0

    What is the Position of pancreas in the body ?

    Solution

    Pancreas is located just below the stomach in abdominal cavity that releases enzymes as well as hormones.

  • Question 6
    1 / -0

    Internal activities are controlled by:-

    Solution

    Central nervous system (CNS) controls the activities of internal organs such as hormone release, movement of food through the stomach and intestines, and the sensations from and muscular control to all internal organs.

  • Question 7
    1 / -0

    Which Plant hormone essential for cell division ?

    Solution

    Cytokinin hormone is responsible for cell division that help in growth of plants. It is found in sites of active cell division in plants for example: Roots tips,seeds,fruits and leaves.

  • Question 8
    1 / -0

    Which hormone cause uterine contraction that leads to labour pain?

    Solution

    progestrone hormone is released during parturition that creates uterine contraction like situation  that cause labour pain.

  • Question 9
    1 / -0

    The gland located in the kidney is

    Solution

    Adrenal gland is located on top of each kidney that releases adrenaline and the steroids aldosterone and cortisol.

  • Question 10
    1 / -0

    Four lobed endocrine gland is

    Solution

    Parathyroid gland is four lobed,this gland is present in the neck region.

  • Question 11
    1 / -0
    Assertion: Cerebrospinal fluid is present throughout the central nervous system.

    Reason: CSF has no function in central nervous system. 
    Solution
    An extracellular fluid, called cerebrospinal fluid is present throughout the central nervous system.
    Cerebrospinal fluid is a clear, colorless fluid produced by the choroid plexus.
    It surrounds the brain and spinal cord.
    It gives protection to central nervous system from injury and shock.
    Thus, the correct answer is option C. 
  • Question 12
    1 / -0
    Tendrils exhibit/twining of tendrils is due to 
    Solution
    Thigmotropism is a movement in which a plant moves or grows in response to touch or contact stimuli. The prefix thigmo- comes from the Greek for 'touch'. Usually thigmotropism occurs when plants grow around a surface, such as a wall, pot or trellis.
  • Question 13
    1 / -0
    Tropic movement is due to:
    Solution
    Tropism is a biological phenomenon indicating the growth or turning movement of a biological organism, usually a plant in response to an environmental stimulus. Tropism response is dependent on the direction of the stimulus (as opposed to nastic movements which are non-directional responses). Tropic movements are caused by cell elongation and will not affect the whole plant
    So, the correct answer is 'Cell elongation'.
  • Question 14
    1 / -0
    'Thigmotropism' is the response of the plant to:
    Solution
    • Thigmotropism is a movement in which a plant moves or grows in response to touch or contact stimuli. 
    • The prefix thigmo - comes from the Greek word for 'touch'. 
    • In some plants, thigmotropism occurs when plants grow around a surface, such as a wall, post, or trellis (E.g. Ivy).

    So, the correct answer is option D.
  • Question 15
    1 / -0
    Pneumatophores show
    Solution
    Pneumatophores are called as breathing roots. They grow in the same direction as that of stem. Thus, it is evident that pneumatophores are positively phototropic and negatively geotropic in growth 
    So, the correct answer is 'Negative geotropism (ageotropism)'
  • Question 16
    1 / -0
    Negative phototropism occurs in:
    Solution
    Phototropism is the plant growth movement in the direction of light (stimulus). While roots grow in the direction opposite to that of light and thus, show negative phototropism (against the stimulus).
    The aerial parts of the plants, including stem, flower, leaf, show positive phototropism (movement towards the direction of light)
    So, the correct answer is option A.
  • Question 17
    1 / -0
    Phototropism of stem and root are due to 
    Solution
    Phototropism in stem and root are due to differential phytohormonal effect. Stem grows positively phototropic. Roots grow negatively geotropic. Auxin is responsible for apical dominance and positive phototropism by stem.
  • Question 18
    1 / -0
    Clinostat is connected with
    Solution
    Response of plant parts to the gravity is called as geotropism. Plant roots show positive geotropism whereas stems show negative geotropism. Clinostat is device which to used to study the effect of geotropism on plant growth and development. It is used in physiology experiments. It is used to mimic the results of plant growth in space. It is also used to grow cell cultures in three dimensions. 
    Thus, the correct answer is option D.
  • Question 19
    1 / -0
    Geotropic response of roots is due to
    Solution
    Gravitropism is also known as geotropism. It is a turning or growth movement by a plant, fungus etc towards the soil. It is a general feature of all higher and many lower plants.These plant parts contain specialized gravity receptors called the statoliths.
    So, the correct answer is 'Response to gravity'
  • Question 20
    1 / -0
    Seasonal movement of stem towards light is
    Solution
    Heliotropism is a form of tropism is the diurnal motion or seasonal motion of plant parts in response to the direction of the sun. The habit of some plants to move in the direction of the sun was already known by ancient Greeks.
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