Question

Consider the following statements (A - C) each with two blanks.
A. Animals like Hydra and jelly fish depict (i)___ symmetry whereas earthworm and leech show (ii)____ symmetry.
B. In (iii)____ and (iv)_____ digestive tract has only single opening (mouth) and is said to be incomplete.
C. Trichinella (Trichina worm) Is a cosmopolitan (v)_____ parasite whereas Fasciola, (liver fluke) lives in the bile ducts of the liver of (vi)____.
Which one of the following options, correctly fills any two statements?

• A. (i)-bilateral, (ii)-radial (v)-snail, (vi)-human
• B. (iii)-Porifera, (iv)-Pisces (v)-human, (vi)-sheep
• C. (i)-radial, (ii)-bilateral (iii)-Coelenterata, (iv)-Platyhelminthes
• D. (iii)-Amphibia, (iv)-Annelida (v)-mosquito, (vi)-human

Answer 1

The correct option is C (i)-radial, (ii)-bilateral (iii)-Coelenterata, (iv)-Platyhelminthes

In animals like Hydra, Jelly fish, star fish, the body can be divided into equal halves by any plane passing through the certain from top to bottom, thus exhibiting radial symmetry. In earthworm and leech, body can be divided into two equal halves by a single plane only thus,. exhibiting bilateral symmetry.In the blind sac body plan the body has a single cavity with one opening to the outside. The single opening functions as both mouth for ingestion and anus for egestion. It Is found in coelenterates and flatworms (Platyhelminthes).