Which one of the following substances is normally found in urine?

• Blood proteins

• Creatinine

• Red blood cells

• Red blood cells

Biodegradable wastes can usually be converted into useful substances with the help of

• Bacteria

• Nuclear proteins

• Radioactive substances

• Radioactive substances

Which is used as an Air pollution indicator?

• Algae

• Fungi

• Bacteria

• Bacteria

Salination of soil is caused by

• Pesticides

• Soil erosion

• Excess irrigation

• Excess irrigation

Mechanism preventing interbreeding is called ____________.

• Adaptation

• Isolation

• Reproduction

• Reproduction

Children especially in western countries who receive very little sunshine suffer from

• Rickets

• Dermatitis

• Scurvy

• Scurvy

The chemical component that is invariably found in all viruses is

• Proteins

• Lipids

• DNA

• DNA

Fermentation is a type of ............ process.

• Aerobic Respiration

• Anaerobic Respiration

• Exothermic Reaction

• Exothermic Reaction

Which enzyme digests proteins in the stomach?

• Trypsin

• Pepsin

• Salivary amylase

• Salivary amylase

Symbiotic Bacteria responsible for the fixation of atmospheric nitrogen are present in

• Peas

• Wheat

• Corn

• Corn