Stimulus - Name of Response - Examples
• light - Phototaxis - Euglena and chlamydomonas swim towards light of low intensity (positive Phototaxis) , and away from light of high intensity (negative Phototaxis); earthworm wriggles away from light (negative Phototaxis)
• Chemicals - Chemotaxis - in a moss plant, sperms swim towards the chemicals produced by the egg cell (positive Chemotaxis)
• Temperature - Thermotaxis - Motile bacteria swim from cold regions to warm regions ( positive Thermotaxis)
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