The stunted growth of a leguminous plant suffering from nitrogen deficiency may be corrected by inoculating the soil with

A. denitrifying bacteria

B. Saprophytic bacteria

C. Rhizobium

D. Nitrosomonas

If water that has been coloured red is poured at the base of a wilting plant, it will appear as a red stain in the cells of the

A. xylem

B. epidermis

C. phloem

D. parenchyma

The aim of the experiment is to demonstrate

A. that in mammal gaseous exchange takes place in the lungs

B. the part played by the pleural cavity and diaphragm in respiration

C. that a large amount of oxygen is absorbed by the lungs

D. the presence of carbon (IV) oxide in the exhaled air

In the experimental set-up, the rubber sheet represents the organ called

A. pleural cavity

B. lungs

C. diaphragm

D. intercostal muscles

The dark reaction of photosynthesis involves the

A. reduction of carbon(IV)oxide to organic

B. release of oxygen and the splitting of water

C. photolysis of water and the production of starch

D. splitting of water into hydrogen

The experiment is used to demonstrate that

A. plants lose water through guttation

B. transpiration occurs through the leaves

C. water is necessary for photosynthesis

D. leaves are important to photosynthesis

In the experiment, the layer of oil serves to prevent water loss

A. transpiration

B. evaporation

C. osmosis

D. guttation

Organisms I, II, III and IV have surface/volume ratios of 1:2, 1:3, 1:4 and 1:5 respectively. The organism that is likely to have the most complex transport system is

A. IV

B. III

C. I

D. II

The part of the mammalian digestive system where absorption of nutrient takes place is the

A. ileum

B. colon

C. oesophagus

D. duodenum

The best method of propagating sugarcane is by

A. Seeding sowing

B. Layering

C. Grafting

D. Stem cuttings