When a plant shows reddish leaves, the soil is deficient in

A. calcium

B. iron

C. nitrogen

D. phosphorus

E. sulphur

Which of the following factors affect population?

A. competition and natality rate

B. heat and space

C. food and mortality rate

D. Space and competition

E. Water and light

The association between guinea worm and tissues of man is called

A. commensalism

B. parasitism

C. predation

D. Saprophytism

E. Symbiosis

Which of the following is NOT true of enzymes?

A. Their reactions are reversible

B. Their reactions are irreversible

C. They remain unchanged after the reaction

D. They are affected by high temperatures

E. They have active sites

The following are major groups of the plant kingdom EXCEPT

A. Bryophyta

B. Chiorophyta

C. Pteridophyta

D. Spermatophyta

E. Thallophyta

The process by which some organisms oxidize inorganic compounds to obtain energy is known as

A. catabolism

B. chemosynthesis

C. glycolysis

D. metabolism

E. photosynthesis

The excretory organ of earthworms is known as

A. contractile vacuole

B. flame cell

C. malphigian tubule

D. nephridium

E. kidney

Which of the following is NOT a family planning method?

A. abstinence

B. contraceptive device

C. masturbation

D. sterilization

E. use of condoms

I 2/2, c 1/1, pm 2/2, m 3/3 The above dental formula represents the dentition of

A. cow

B. dog

C. man

D. rabbit

E. sheep

Which practice does NOT promote the health of the community?

A. burning of refuse in incinerators

B. disposal of human sewage using water closets

C. legislating in favour of sexual indulgence

D. provision of portable pipe-borne water

E. sitting of industries downstream away from habitations