The male cockroach differs from the female by having

A. mandibles

B. a pair of style

C. spiracles

D. a pair of cerci

The fins making up the limbs of the bony fish are

A. caudal and ventral

B. ventra and pelvic

C. pelvic and pectoral

D. pectoral and dorsal

The stem differs from the root in having the xylem and phloem strands

A. on the same radii

B. scattered

C. on alternate radii

D. towards the pith

Oxygen liberated during photosynthesis has been demonstrated to come from

A. carbondioxide

B. air

C. water

D. chlorophyll

Which of these is a trace element?

A. Iron

B. Copper

C. Calcium

D. Sulphur

The main organic substances found in the human body are

A. carbohydrates, proteins and salts

B. salts, fats and proteins

C. fat, carbohydrates and protein

D. salts, fats and carbohydrates

Which of the following elements is essential for the formation of haemoglobin?

A. Sodium

B. Potassium

C. Calcium

D. Iron

The severe deficiency of vitamin C leads to

A. Kwashiokor

B. beriberi

C. pellagra

D. scurvy

In addition to the high calories derived from fats and oils, they are

A. used in producing new cells

B. necessary for enzyme formation

C. used as insulators for cold

D. required for growth

The extract from food substance reacting with sodium hydroxide and copper sulphate solutions will produce violet to purple coloration if

A. fats are presents

B. carbohydrate is present

C. protein is present

D. reducing sugar is presents