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How many pairs of setae are there in each segment of the worm？Does each segment have...

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Biology

  1. How many pairs of setae are there in each segment of theworm？Does each segment have setae?
  2. What body region or segment are the walking legsattached to? What about the swimmerets?
  3. What is the function of these gills?
  4. Try to identify and explain what the crayfish had beeneating:

  5. Inside the stomachlocate the gastric mill, a hard serrated structure. Study itclosely by running a finger along the tooth-like margin.

    What is this structure’s function?

  6. What are the functions of the skin gills andpedicellariae?

Answer & Explanation Solved by verified expert
4.2 Ratings (804 Votes)
Earthworm is a reddish brown terrestrial invertebrate that inhabits the upper layer of the moist soil Earthworms have long cylindrical body The body is divided into more than hundred short segments which are similar metameres about 100120 in number The dorsal surface of the body is marked by a dark median mid dorsal line dorsal blood vessel along the longitudinal axis of the body The ventral surface is distinguished by the presence of genital openings pores Answer for question 1 The    See Answer
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