SSC Ecology And Environment Sample Paper NCERT Sample Paper-6

  • question_answer
    Chemicals released by certain organisms that provide adaptive advantage to the emitters (producers) are called

    A)  Kairomones      

    B)  Allomones

    C)  Hormones        

    D)  Pheromones

    Correct Answer: B

    Solution :

    [b] An Allomone is any chemical substance produced and released by an individual of one species that affects the behaviour of a member of another species to the benefit of the originator but not the receiver. A Kairomone is a semiochemical, emitted by an organism, which mediates interspecific interactions in a way that benefits an individual of another species which receives it, and harms the emitter. Hormones are chemical messengers that are secreted directly into the blood, which carries them to organs and tissues of the body to exert their functions. Pheromones are airborne chemical messengers released from the body (through, for example, sweat and urine) that have a physical or emotional effect on another member of the same species.

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