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NEET-XI-Biology

07: Structural Organisation in Animals

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    7 - Structural Organisation in Animals
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    Section : I
    Page No 122:
  • Qstn #1
    Answer in one word or one line.
  • Qstn #1-i
    Give the common name of Periplaneta americana. () How many spermathecae are found in earthworm? () What is the position of ovaries in cockroach? () How many segments are present in the abdomen of cockroach? () Where do you find Malpighian tubules?
    Ans : Cockroach.
    () Four pairs.
    () In cockroach two large ovaries, lie laterally in the 2nd - 6th abdominal segments’.
    () Abdomen of cockroach consists of 10 segments.
    () Malpighian tubules are present at the junction of midgut and hindgut in cockroach.
  • Qstn #1-ii
    How many spermathecae are found in earthworm?
    Ans : Four pairs.
  • Qstn #1-iii
    What is the position of ovaries in cockroach?
    Ans : In cockroach two large ovaries, lie laterally in the 2nd - 6th abdominal segments’.
  • Qstn #1-iv
    How many segments are present in the abdomen of cockroach?
    Ans : Abdomen of cockroach consists of 10 segments.
  • Qstn #1-v
    Where do you find Malpighian tubules?
    Ans : Malpighian tubules are present at the junction of midgut and hindgut in cockroach.
  • Qstn #2-i
    What is the function of nephridia?
    Ans : Nephridia are segmentally arranged excretory organs present in earthworms.
  • Qstn #2-ii
    How many types of nephridia are found in earthworm based on their location?
    Ans : On the basis of their location, three types of nephridia are found in earthworms. They are:

    (a) Septal nephridia: These are present on both sides of the inter-segmental septa behind the 15th segment. They open into the intestines.

    (b) Integumentary nephridia: These lie attached to the body wall from the third segment to the last segment, which opens on the body surface.

    (c) Pharyngeal nephridia: These are present as three paired tufts in fourth, fifth, and sixth segments.
  • Qstn #3
    Draw a labelled diagram of the reproductive organs of an earthworm.
    Ans :
  • Qstn #4
    Draw a labelled diagram of alimentary canal of a cockroach.
    Ans :
  • Qstn #5
    Distinguish between the following
  • #5-a
    Prostomium and peristomium
    Ans :


    Prostomium
    		 Peristomium
    Prostomium is a small fleshy lobe, which overhangs the mouth of an earthworm. It helps the organism push into the soil and is sensory in function. The first body segment in the earthworm is called the peristomium. It surrounds the mouth opening.
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