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

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

Metameric segmentation is the characteristic of

• Platyhelminthes and Arthropoda

• Echinodermata and Annelida

• Annelida and Arthropoda

• Annelida and Arthropoda

Biradial symmetry and lack of cnidoblasts are the characteristics of

• Starfish and sea anemone

• Ctenoplana and Beroe

• Aurelia and Paramecium

• Aurelia and Paramecium

46.

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

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

Which of the following represents order of 'Horse'?

• Equidae

• Perissodactyla

• Caballus

• Caballus

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)

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

• Ostia

• Oscula

• Choanocytes

• Choanocytes