Question

To complete its life-cycle human liver fluke depends on

• A. Two intermediate hosts—snail and sheep
• B. One intermediate host—snail
• C. Two intermediate hosts—snail and fish
• D. One intermediate host—sheep

Answer 1

The correct option is C Two intermediate hosts—snail and fish

Human liver flukes are digenetic parasites belonging to the class Trematoda of phylum Platyhelminthes.

It depends upon two hosts to complete its life cycle. These are:

• Vertebrate: Site of sexual reproduction.
• Mollusc: Site of asexual reproduction.

Since, snail is a mollusc and fish is a vertebrate, hence, these are the two possible intermediate hosts of human liver fluke.