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Control and Coordination Test 0

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Weekly Quiz Competition
  • Question 1
    1 / -0
    Nervous system regulates many endocrine process in the body.
  • Question 2
    1 / -0
    Central nervous system consists of ----- and -----.
  • Question 3
    1 / -0
    The growth movements of plants in response to the force of gravity is called:
    Solution
    • Hydrotropism is the growth movement of plants in response to water gradient (e.g. growth movement of roots in the soil in search for water.
    • Geotropism is growth movement by a plant in response to gravity (e.g. most of the roots grow downwards).
    • Chemotropism is the growth movement of plants, in response to a chemical substance. (e.g. movement of pollen tubes towards ovary).
    • Phototropism is the growth movement of plants in response to light (e.g. movement of sunflower in the direction of light).
    So, the correct answer is option B.
  • Question 4
    1 / -0
    Choose the correct alternate in which the type of tropism exhibited by plants is correctly matched with the stimulus to which they respond.

    Tropism                     Stimulus
     1) Hydrotropism       i) Earth 
    2) Geotropism          ii) Light
    3) Chemotropism     iii) Water 
    4) Phototropism       iv) Chemical
    Solution
    • There is a various stimulus to which plants respond and show growth or movement. 
    • Hydrotropism is the movement of the shoot in response to the water concentration. 
    • Geotropism is the movement of the shoot in response to the earth's gravity. 
    • Chemotropism is the movement of the shoot in response to the chemical stimulus. 
    • Phototropism is the movement of a shoot towards the light.
    Thus, the correct answer is option B. 
  • Question 5
    1 / -0
    Which cell organelle is absent in neuron?
    Solution
    A centriole is a small set of microtubules arranged in a specific way. There are nine groups of microtubules. When two centrioles are found next to each other, they are usually at right angles. The centrioles are found in pairs and move towards the poles (opposite ends) of the nucleus when it is time for cell division. Neurons cannot divide because they lack centrioles.
    Because centrioles function in cell division, the fact that neurons lack these organelles is consistent with the amitotic nature of the cell.
    Therefore, the correct answer is option C.
  • Question 6
    1 / -0
    Which of the following is not a part of nervous tissue?
  • Question 7
    1 / -0
    Which of the following are correct names for the parts of neuron?
  • Question 8
    1 / -0
    Which of the following is correct?
    Solution
    The spinal cord is a part of the central nervous system. The most important structure between our body and our brain is the spinal cord. It extends from the foramen magnum, where it is continuous with the medulla to the level of the first or second lumbar vertebrae. It is a vital link not only from the brain to the body but also from the body to the brain. The spinal cord is 40 to 50 cm long and 1 cm to 1.5 cm in diameter. 
  • Question 9
    1 / -0
    Movement of pollen tube towards ovule is:
    Solution
    Chemotropism is a type of growth response to a chemical stimulus. An example of chemotropic movement in plants can be seen during the growth of the pollen tube towards the ovules contained in the ovary. The ovary releases chemicals that produce a positive chemotropic response from the developing pollen tube. The pollen tube carries the male gametes. These male gametes reach the ovules through the growing pollen tube and then fertilization occurs.
    Therefore, the correct answer is option A.
  • Question 10
    1 / -0
    Which cells form no layers and remain separate?
    Solution
    • Nerve cells or neurons are the longest cells of the body. They form the structural and functional unit of the nervous system. 

    • Nerve cells do not form layers and are structurally separated from one another, but can communicate through the synapse.

    • Epithelial cells, muscle cells, and gland cells are arranged in layers.

    So, the correct answer is option 'C'.

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