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Phylum Echinodermata                      starfish dissection         Starfish external structure examination Identify: Oral surface Mouth Tube feet Ambulacral groove Aboral surface Arm Spines Central disk Madreporite List examples for the following classes. Class...

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Question

Biology

PhylumEchinodermata                     

  1. starfish dissection

       Starfish external structure examination

Identify:

  1. Oral surface

Mouth

Tube feet

Ambulacral groove

  1. Aboral surface

Arm

Spines

Central disk

Madreporite

  1. List examples for the following classes.
  1. Class Asteroidea

  1. Class Ophiuroidea

  1. Class Crinoidea

  1. Class Echinoidea

  1. Class Holothuroidea

Answer & Explanation Solved by verified expert
3.6 Ratings (696 Votes)
Ans1 The lower surface of the body kept towards the substraum is flat and called oral surface The upper surface of body is convex and is called aboral surface aoral surface Mouth circular aperture at the top of 5rayed depression at the center of the oral surface of the central side The depression is known as Actinostome The mouth    See Answer
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