One example of animals having a single opening to the outside that serves both as mouth as well as anus is 

• Octopus

• Asterias

• Ascidia

• Ascidia

The figure shows four animals (A),(B) (C) and (D). Select the correct answer with respect to common characteristics of two animals.

• (A) and (D) respire mainly through the body wall

• (B) and (C) shows radial symmetry

• (A) and (B) have cnidoblasts for self -defence

• (A) and (B) have cnidoblasts for self -defence

Which of the following endoparasites of humans does show viviparity?

• Ancylostoma duodenale

• Enterobius vermicularis

• Trichinella spiralis

• Trichinella spiralis

One very special feature in the earthworm pheretima is that

• the typhlosole greatly increases the effective absorption area of the digested food in the intestine

• the S- shaped setae embedded in the integument are the defensive weapons used against the enemies

• It has a long dorsal tubular heart

• It has a long dorsal tubular heart

Which of the following animals is not viviparous?

• Flying fox(bat)

• Elephant

• Platypus

• Platypus

The pathogen Microsporum responsible for ringworm disease in humans belongs to the same kingdom of organisms as that of 

• Taenia, a tapewarm

• Wuchereria, a filarial worm

• Rhizopus, a mould

• Rhizopus, a mould

Which one of the following statements is totally wrong about the occurrence of the notochord, while the other three are correct? 

• It is present only in larval tail in Ascidians

• It is replaced by a vertebral coloumn in adult frog

• It is absent throughout life in humans from the very beginning

• It is absent throughout life in humans from the very beginning

Uricotelic mode of passing out nitrogenous wastes is found in

• birds and annelids

• amphibians and reptiles

• insects and amphibians

• insects and amphibians

In which one of the following the genus name, its tow characters and its class/ phylum are correctly matched?

• Genus	Two characters	Class/phylum
  Salaman dra	i).A tympanum represents ear	Amphibia

• Genus	Two characters	Class/phylum
  Pteropus	i)Skin possesses hair ii)Oviparous	Mammalia

• Genus	Two characters	Class/phylum
  Aurelia	i)Cnidoblas ii)Organ level of organization	Colenterata

• Genus	Two characters	Class/phylum
  Aurelia	i)Cnidoblas ii)Organ level of organization	Colenterata

Which one of the following groups of animals is correctly matched with its one characteristic feature without even a single exception?

• Chordata - possess a mouth provided with an upper and a lower jaw

• Chondrichthyes - possess cartilaginous endoskeleton

• Mammalia - give birth to young ones

• Mammalia - give birth to young ones