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Question

___________ sense the changes in the external environment of a leech.
  1. Segmental hair
  2. Segmental receptors
  3. Segmental pore
  4. Suckers


Solution

The correct option is B Segmental receptors
Each segment bears a number of sensory projections called receptors. Annular receptors are located in each annulus and segmental receptors are located on the first annulus of each segment. The segmental receptors sense the changes in the external environment of a leech.

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