Which one feature is common to leech, cockroach and scorpion?

• Nephridia

• Ventral nerve cord

• Cephalization

• Antennae

Intermediate host is absent in the infection of

• Plamosdium

• Trypanosoma

• Entamoeba

• Filarial worm

Duodenum has characteristic Brunner's gland which secretes two hormones called

• prolactin, parathormone

• secretin, cholecystokinin

• enterocrinin, duocrinin

• gastrin, enterogastrone

Which one of the following depresses brain activity and produces feelings of calmness, relaxation and drowsiness?

• Morphine

• Valium

• Amphetamines

• Hashish

Which one of the following is a sesamoid bone?

• Pelvis

• Patella

• Pterygoid

• Pectoral girdle

The type of epithelial cells which line the inner surface of Fallopian tubes, bronchioles and small bronchi are known as

• squamous epithelium

• columnar epithelium

• ciliated epithelium

• cuboidal epithelium

Which of the following is the characteristic of PS-I?

• It is active only upto 680 nm of light.

• The reaction centre of PS- I is P₆₈₀.

• PS- I is reduced by the electrons released in photolysis of water.

• PS-I is involved in non-cyclic photophosphorylation.

Respiration is controlled by

• medulla oblongata

• cerebellum

• hypothalamus

• cerebrum

Which of the following nerves arises from organ of Corti?

• Olfactory nerve

• Cochlear nerve

• Abducens nerve

• None of these

What is diapedesis?

• A kind of amoeboid movement.

• The process of filtration of urea in kidney.

• A type of locomotion found in Hydra

• Migration of WBCs into the tissue spaces from blood capillaries