Structural Organisation in Animals

Structural Organisation in Animals

Moderate Questions
Difficult Questions

Advanced Zoology

Animal Kingdom
Structural Organisation in Animals
Digestion and Absorption
Breathing and Exchange of Gases
Body Fluids and Circulation
Excretory Products and their Elimination
Locomotion and Movement
Neural Control and Coordination
Chemical Coordination and Integration
Human Reproduction
Human Health and Disease
Biotechnology Principles and Processes
Biomolecules (Zoology)
Evolution (Zoology)
Biotechnology and its Applications
Reproductive Health
  1. Select the correct statement from the ones given below with respect to Periplaneta americana.








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    The anal styles in males cockroaches help in copulation.

    Correct Option: B

    The anal styles in males cockroaches help in copulation.

  1. Earthworm possesses hearts








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    Earthworm has 4 pairs of heart i.e., 2 pairs-Lateral hearts and 2 pairs-Lateral oesophageal hearts present in 7th and 9th and 12th and 13th segments respectively.

    Correct Option: B

    Earthworm has 4 pairs of heart i.e., 2 pairs-Lateral hearts and 2 pairs-Lateral oesophageal hearts present in 7th and 9th and 12th and 13th segments respectively.

  1. A. Periplaneta americana is nocturnal, omnivorous, household pest.
    R. It is because it acts as scavenger








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    Periplaneta americana (cockroach) cannot act as a scavanger, it does not feed upon dead animals.

    Correct Option: C

    Periplaneta americana (cockroach) cannot act as a scavanger, it does not feed upon dead animals.

  1. A piece of bone such as femur of frog if kept in dilute HCl for about a week will








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    When a bone is kept in dilute acids like HCl for a few days, the Ca2+ salts get dissolved leaving only the soft and flexible organic matrix. This process is called decalcification. If a bone is kept in KOH it remains unaffected and only the surrounding muscles and connective tissues get dissolved so that the bone now appears clean.

    Correct Option: C

    When a bone is kept in dilute acids like HCl for a few days, the Ca2+ salts get dissolved leaving only the soft and flexible organic matrix. This process is called decalcification. If a bone is kept in KOH it remains unaffected and only the surrounding muscles and connective tissues get dissolved so that the bone now appears clean.

  1. Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to








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    Earthworms have no skeleton but during burrowing, anterior end becomes turgid and acts as a hydraulic skeleton. It is due to coelomic fluid. The coelom is filled with an alkaline milky coelomic fluid. This coelomic fluid contains water, salts, proteins and 4 types of cells namely amoebocytes, mucocytes, circular cells and chloragogen cells.

    Correct Option: A

    Earthworms have no skeleton but during burrowing, anterior end becomes turgid and acts as a hydraulic skeleton. It is due to coelomic fluid. The coelom is filled with an alkaline milky coelomic fluid. This coelomic fluid contains water, salts, proteins and 4 types of cells namely amoebocytes, mucocytes, circular cells and chloragogen cells.