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Structural Organisation in Animals Test - 9

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Structural Organisation in Animals Test - 9
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  • Question 1
    1 / -0

    The number of ganglia in the nervous system of cockroach is

    Solution

    The nervous system of cockroach consists of a series of fused, segmentally arranged ganglia. They are joined by paired longitudinal connectives on the ventral side. Three ganglia lie in the thorax, and six ganglia are found in the abdomen.

  • Question 2
    1 / -0

    What type of metamorphosis occurs in cockroach?

    Solution

    The development of cockroach is paurometabolous. This means a gradual development from nymphal stage to adult stage. Nymph represent miniature adult and lives in same habitat.

  • Question 3
    1 / -0

    In cockroach, a mushroom shaped gland is present in

    Solution

    A characteristic mushroom shaped gland is present in the 6th-7th abdominal segments of the cockroach. This gland functions as an accessory reproductive gland.

  • Question 4
    1 / -0

    Largest single mass of lymphatic tissue in the body isMatch the following and choose the correct answer with reference to cockroach:

    Column I
    a) Bundles of sperm
    b) External genitalia
    c) Chain of developing ova
    d) Opening of ejaculatory duct

    Column II
    i) Ovarioles
    ii) Gonopore
    iii) Phallomere
    iv) Spermatophore

    Solution

    The sperms are stored in the seminal vesicles and are glued together in the form of bundles called spermatophores which are discharged during copulation.. The external genitalia are represented bychitinous asymmetrical structuressurrounding the male gonopore is called male gonapophysis or phallomere.Each ovary is formed of a group of eightovarian tubules or ovarioles, containing a chain of developing ova. The ejaculatory duct opens into male gonopore situated ventral to anus.

  • Question 5
    1 / -0

    The pericardial space in cockroach is regulary altered by the muscles

    Solution

    Cockroaches have open circulatory system. Their pericardial space is regularly altered by alary muscles.

  • Question 6
    1 / -0

    The mouth part of cockroach which is compared to tongue is

    Solution

    A median flexible lobe called as hypopharynx act as tongue. It lies within the cavity enclosed by the mouth parts.

  • Question 7
    1 / -0

    How many times do nymphs moult to reach the adult form of cockroach?

    Solution

    When the ootheca hatches, tiny nymph come out. It grows by undergoing moulting about 13 times to reach the adult form.

  • Question 8
    1 / -0

    Blood consists of

    Solution

    Blood is a fluid connective tissue containing plasma. It contains red blood cells (RBC), white blood cells (WBC) and platelets suspended in the plasma. 

  • Question 9
    1 / -0

    In frog, during aestivation and hibernation gaseous exchange takes place through

    Solution

    As the frog becomes inactive during aestivation and hibernation,  gaseous exchange does not take place through lungs. It takes place through skin.

  • Question 10
    1 / -0

    The lymph in frog lacks

    Solution

    The lymph is different from blood. It is known as tissue fluid. Lymph is yellowish in colour as it lacks RBCs and few proteins.

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