Which of the following enables mammals to maintain balance?

A. Cochlea

B. Eustucian tube

C. Ossicle

D. Semi-circular canal

E. Tympanic membrane

Cellular respiration occurs in the

A. chloroplast

B. endoplasmic reticulum

C. food vacuole

D. mitochondrion

E. nucleus

Which of these vertebrae is of the same number in man and rabbit?

A. Caudal

B. Cervical

C. Lumber

D. Sacral

E. Thoracic

These animals exhibit camouflage EXCEPT

A. chameleon

B. crab

C. crocodile

D. lizard

E. snake

Which of the following is a characteristic of mollusc?

A. Bodies are protected by hard exoskeleton

B. Bodies are segmented

C. Body walls have three layers

D. Presence of paired jointed appendages

E. The head bears a pair of antennae

These groups of bacteria are harmless EXCEPT

A. denitrifying

B. nitrifying

C. nitrogen-fixing

D. parasitic

E. saprophytic

Which of the following enzymes act on carbohydrates?

A. Amylase

B. Lipase

C. Pepsin

D. Renin

E. Trypsin

Plants use Nitrogen in the form of

A. ammonia

B. ammonium

C. nitrates

D. nitrites

E. urea

Digested food is carried from small intestine to the liver by the

A. hepatic artery

B. hepatic portal vein

C. hepatic vein

D. inferior vena cava

E. superior vena cava

The following processes release carbondioxide into the atmosphere EXCEPT

A. combustion

B. decomposition

C. putrefaction

D. respiration

E. transpiration