In a dicotyledonous stem, the zone between the epidermis and the pericycle is the

A. cortex

B. stele

C. xylem

D. ploem

The order of passage of food in the digestive system is?

A. ileum → caecum → large intestine → rectum

B. ileum → colon → caecum →rectum

C. large intestine →ileum → caecum →rectum

D. colon → caecum → ileum →rectum

Insectivorous plants traps and kill their prey to derive

A. phosphorous

B. calcium

C. nitrogen

D. zinc

In the alimentary system of a bird, the function of teeth is carried out by the

A. crop

B. beak

C. gizzard

D. tongue

What will happen wen two equal sized pieces of unripe pawpaw labelled X and Y are dropped into equal volumes of concentrated salt solution and distilled water respectively?

A. pawpaw X will become turgid

B. both will increase in size

C. pawpaw Y will become turgid

D. both will decrease in size

Exhaled air differs from inhaled air in that it

A. less amount of carbon(IV) oxide

B. is usually lower in temperature

C. often has more oxygen

D. usually has more water vapour

In the mammalian kidney, the Bowman''s capsules is located in the

A. ureter

B. pelvis

C. cortex

D. medulla

A plant parenchyma cell also acts as a supporting tissue when it

A. becomes flaccid

B. contains crystals

C. becomes turgid

D. is pigmented

During ovulation, an egg is released from the

A. corpus luteum

B. ovarian funnel

C. graafian follicle

D. fallopian tube

The transmission of impulses along a nerve fibre is characterized by

A. hormonal and temperature changes

B. electrical and ionic changes

C. hormonal and changes

D. electrostatic changes