In case of poriferans the spongocoel is lined with flagellated cells called :

• Ostia

• Oscula

• Choanocytes

• Choanocytes

In which one of the following sets of animals do all the four give birth to young ones?

• Lion, bat, whale, ostrich

• Platypus, penguin, bat, hippopotamus

• Shrew, bat, cat, kiwi

• Shrew, bat, cat, kiwi

Which of the following represents order of 'Horse'?

• Equidae

• Perissodactyla

• Caballus

• Caballus

What is common between parrot, platypus and kangaroo?

• Homeothermy

• Toothless jaws

• Functional post-anal tail

• Functional post-anal tail

Which one of the following is a matching set of a phylum and its three examples?

• Cnidaria — Bonellia, Physalia, Aurelia

• Platyhelminthes — Planaria, Schistosoma, Enterobius

• Mollusca — Loligo, Teredo, Octopus

• Mollusca — Loligo, Teredo, Octopus

Which one of the following phyla is correctly matched with its two general characteristics? 

• Arthropoda - Body divided into head, thorax and abdomen and respiration by tracheae.

• Chordata - Notochord at some stage and separate anal and urinary openings to the outside

• Echinodermata - Pentamerous radial symmetry and mostly internal fertilisation

• Echinodermata - Pentamerous radial symmetry and mostly internal fertilisation

Frog's heart when taken out of the body continues to beat for some time
Select the best option from the following statements
(a) Frog is a poikilotherm
(b) Frog does not have any coronary circulation
(c) Heart is 'myogenic' in nature
(d) Heart is autoexcitable

• Only (c)

• Only (d)

• (a) & (b)

• (a) & (b)

Biradial symmetry and lack of cnidoblasts are the characteristics of

• Starfish and sea anemone

• Ctenoplana and Beroe

• Aurelia and Paramecium

• Aurelia and Paramecium

Two commons characters found in centipede, cockroach and crab are

• compound eyes and anal cerci

• jointed legs and chitinous exoskeleton

• green gland and tracheae

• green gland and tracheae

Metameric segmentation is the characteristic of

• Platyhelminthes and Arthropoda

• Echinodermata and Annelida

• Annelida and Arthropoda

• Annelida and Arthropoda