In which of the following class of Annelida, one pair ovaries and several pair testes are found ?

• Archiannelida

• Hirudinea

• Oligochaeta

• Polychaeta

Hydrophytes are characterised by :

• thick and large leaf

• delicate and mucilagenous stem

• short spinous stem

• all of the above

Kaziranga National Park is famous for :

• Rhinoceros

• Tiger

• Asiatic lion

• Nilgai

Which of the following is a coelenterate ?

• Sea lily

• Sea squirt

• Sea cucumber

• Sea fan

All worms are :

• triploblastic

• segmented

• endo-parasites

• free - living

As per classification which of the following is correct ?

• Ascaris, Pheretima, Grasshopper

• Hydra, Pterido, Leucosolenia

• Starfish, Grasshopper, Solen

• Pila, Dentalium, Octopus

The universal recipient blood group is :

• O (+ ve)

• AB (+ ve)

• O (- ve)

• AB (- ve)

Commercial silk is obtained from :

• cocoon/ pupa

• caterpiller

• adult moth

• both egg and adult moth

Continuous bleeding from an injured part of body is due to deficiency of :

• Vitamin A

• Vitamin B

• Vitamin K

• Vitamin E

Pearl oyster is a mollusc which belongs to class :

• Cephalopoda

• Pelecypoda

• Scaphopoda

• Gastropoda