Free Animal Kingdom (Daily Quiz: 13) NEET Biology Questions & Answers with Detailed Explanation & Full Review

Answer: (c)

Jellyfish belongs to the Class Scyphozoa of the Phylum Cnidaria. Its genus is Aurelia.

Answer: (c)

Duck-billed platypus is an egg laying mammal. It is found in the rivers in Eastern Australia and Tasmania. It is a beaver like monotreme about 50-60 cm long and well adapted to live in water. Usually, two eggs are laid at a time. The female curls around them for incubation and remains inactive for about two weeks. Newly hatched young ones are very immature, naked, blind and each is 2.5 cm long.

Answer: (d)

Mollusca includes those animals which have soft bodies, usually furnished with a shell. The body is often divided into a head, with eyes or tentacles, a muscular foot and a visceral mass housing the organs. Loligo (squid or sea arrow), Teredo (shipworm), Octopus are some of their examples. In option (a) Spongilla and Euplectella belong to porifera but Pennatula (the sea pen or sea feather) belongs to coelenterata. In option (b) Physalia and Aurelia belong to cnidaria but Bonellia belongs to Phylum Annelida. In option (c) Planaria and Schistosoma belong to platyhelminthes but Enterobius (Pinworm) belongs to aschelminthes.

Answer: (d)

In Fasciola (flatworms) the body has a single cavity with one opening to the outside. The single opening functions as both mouth for ingestion (intake of food) and anus for egestion (undigested food is passed out). It is called blind sac plan. Other examples are coelenterates.