The topmost layer of a typical soil profile is

A. clay

B. coarse sand

C. fine sand

D. gravel

E. humus

Which of these is NOT part of a seed?

A. Cotyledon

B. Embryo

C. Endosperm

D. Pericarp

E. Testa

Which of the following functions of the body are nephrons associated with?

A. Circulation

B. Digestion

C. Excretion

D. Reproduction

E. Respiration

In a moss plant, spores are produced in the

A. capsule

B. leaf

C. rhizoid

D. seta

E. stalk

Which of these organisms reproduces by budding?

A. Amoeba

B. Euglena

C. Hydra

D. Paramecium

E. Volvox

Which of these is NOT a pollutant?

A. Carbondioxide

B. Lead oxide

C. Nitrogen gas

D. Nitrogen oxide

E. Sulphur dioxide

Villi are finger-like structures found in the

A. large intestine

B. rectum

C. small intestine

D. stomach

E. tongue

Over-grazing encourages soil

A. acidity

B. conservation

C. erosion

D. fertility

E. formation