Mention the receptors for light and sound in animals.
Animals receive a variety of external information through specialized structures called sense organs or receptors. These are: (i) Photoreceptors: They receive light. (ii) Phonoreceptors: They receive sound.
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Name multicellular organisms in which coordination is achieved only by means of chemicals.
Plants.
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What are the two modes of coordination found in multicellular animals?
(1) Chemical coordination (2) Nervous coordination.
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