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Structural Organisation in Animals Test - 15

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Structural Organisation in Animals Test - 15
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  • Question 1
    1 / -0
    Excretory organs of Cockroach are
    Solution
    Excretion is performed by Malpighian tubules. Each tubule is lined by glandular and ciliated cells. They absorb nitrogenous waste products and convert them into uric acid which is excreted out through the hindgut. Therefore, this insect is called uricotelic. The fat body nephrocytes and urecose glands also help in excretion.
    So the correct answer is 'Malpighian tubules'.
  • Question 2
    1 / -0
    In leg of Cockroach, trochanter is followed by
    Solution
    There are three pairs of walking legs in the cockroach. Each leg is formed of 5 podomeres. The arrangement of podomeres is as follows: Coxa, Trochanter, Femur, Tibia and Tarsus. 
    So, the correct answer is 'Femur'.
  • Question 3
    1 / -0
    Earthworm has no skeleton. During burrowing anterior end becomes turgid and acts as hydraulic skeleton. It is due to
    Solution
    The earthworm has no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to coelomic fluid. The coelom is filled with alkaline, milky coelomic fluid. 
    So, the correct answer is 'Coelomic fluid'.
  • Question 4
    1 / -0
    Which is absent in blood of Cockroach ?
    Solution
    The cockroach has an open vascular system consisting of sinuses filled with blood. The blood of cockroach is without haemoglobin or any other respiratory pigment. This type of blood devoid of any respiratory pigment is called haemolymph.
    So, the correct answer is 'Respiratory pigment'.
  • Question 5
    1 / -0
    Chloragogen cells are
    Solution
    The chloragogen cells are also called as 'y-cells'. These cells in annelids are functionally similar to liver of vertebrates. These cells undertake many functions. They store glycogen and also neutralize toxins. They also take part in deamination of amino acids and synthesise urea.
    So, the correct answer is 'Polyfunctional'.
  • Question 6
    1 / -0
    A detrivorous animal of economic importance is
    Solution
    Earthworms eat decaying plant and animal matter in the soil. They are classic examples of detritivores because they consume organic material from the soil. Leech feeds on blood. Fowls feed on seeds and insects and caterpillar larva on leaves. As earthworm is detritivorous, it is used in the preparation of compost. 
    So, the correct answer is 'Earthworm'.
  • Question 7
    1 / -0
    The fibrous tissue which connects the two bone is
    Solution
    • Connective tissue is a type of tissue in which cells are loosely spaced and embedded in a rigid, jelly-like, fluid matrix.
    • Tendon is a fibrous tissue connecting muscle to bone.
    • Adipose tissue is fat-storing tissue, which is present below the skin and between internal organs. 
    • A ligament is a fibrous tissue connecting bones to other bones. 
    Therefore, option C is correct. 
  • Question 8
    1 / -0
    In mouth parts of Cockroach, galea and lacinia form part of
    Solution
    The appendages of the 5th segment are a pair of maxillae which can also be called side lips. Each maxilla is made of a basal piece called cardo attached to stipes and palpiger, the last piece carries 3-4 segmented palp that carries chemoreceptors. At the apical end of the maxilla are attached galea and lacinia, the former functions like a cover and the latter is toothed and is used for chewing food.
    So, the correct answer is 'Maxilla'.
  • Question 9
    1 / -0
    Cockroach crushes food with the help of its
    Solution
    Digestion begins first at the mouth where the parts like mandibles and maxillae help to chew the food. The mandibles cut off pieces of food and crush them before they are swallowed. The other mouthparts help select the food and manipulate it between the jaws. 
    So, the correct answer is 'Mandibles'.
  • Question 10
    1 / -0
    Arolium of Cockroach helps in
    Solution
    In Cockroach, The claws and the arolium help in locomotion on rough surfaces whereas planulae are useful on smooth surfaces. 
    So, the correct answer is 'Locomotion'.
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