A sponge harmful to oyster industry is

• Cliona

• Euspongia

• Hyalonema

• Spongilla

During meiosis crossing over occurs at

• pachytene

• zygotene

• leptotene

• diakinesis

The reabsorption of water in the kidney is under the control of

• LH

• ADH

• STH

• ACTH

In sea anemone, the symmetry is

• radial

• bilateral

• spherical

• absent

Which of following organ can be called a sort of "blood bank" ?

• Heart

• Spleen

• Liver

• Lungs

The vital capacity of human being is about

• 1200 mL

• 4800 mL

• 2400 mL

• 3600 mL

The hormone which stimulates constriction of gall bladder

• gastrin

• secretin

• glucagon

• cholecystokinin

Which vitamin should not be stored ?

• Calciferol

• Retinal

• Niacin

• Ascorbic acid

Eustachian canal connects

• middle ear with external ear

• middle ear with internal ear

• external ear with internal ear

• pharynx with middle ear

A man of 'A' blood group marries a woman of 'AB' blood group, which type of progeny would indicate that man is heterozygous ?

• O

• B

• A

• AB