Question

Choose the correct combinations:
a. Turbellaria -Mostly free-living flatworms with - Convoluta mucus forming rhabdites in body wall
b. Trematoda - Commonly called flukes with two suckers
c. Cestoda - Ecto-and endoparasites, body segmented Echinococcus
d. Phasmidia - Amphids forming chemoreceptor function - Trichuris

• A. (b) and (c)
• B. (a) and (b)
• C. (a), (c) and (d)
• D. (a), (b) and (d)

Answer 1

The correct option is B (a) and (b)

• Trematoda is a clade within the phylum Platyhelminthes. It includes two groups of parasitic flatworms, known as flukes. Generally, trematodes are endoparasites, meaning that they attach to the internal tissue of the host such as the digestive tract or the liver. Most are dorso-ventrally flattened and typically have two suckers, an oral sucker around the mouth for feeding and a ventral sucker, which they use to attach to the host.
  
• The Turbellaria are one of the traditional sub-divisions of the phylum Platyhelminthes, are free-living. Turbellaria lives in freshwater, seawater, and wet terrestrial habitats. Rhabdites are rod-shaped secretory products characteristic of the Turbellaria. InAlloioplana, Monocelis andPolychoerus ( Turbellaria) the rhabdites are the only, or most common, a secretory product released on the ventral locomotor sole and therefore they are thought to form the viscous mucus used in locomotion by ciliary gliding.
  

So, the correct answer is '(a) and (b)'.