7 S.St. Ch. 6 Life on the Earth Something To Know : .A. Tick ( ) the correct option. 1. Which one of the following is a threat to ecological balance? (a) plantation (b) wildlife protection (c) population growth (d) growing crops 2. Taiga is --- (a) a Russian name for evergreen coniferous forests. (b) an animal living in the polar region. ( c) a softwood tree . (d) a cold desert area. 3. For the preservation of varied plant and animal life, the government has set up various --- (a) zoological parks (b) industrial parks (c) national parks ( d) adventure parks 4. Mosses and lichens are --- (a) commonly found vegetation in the polar regions . (b) trees found in tropical deciduous forests, (c) insects - eating animals. (d) animals having thick fur on their body. 5. The temperate grasslands of North America are called the -- (a) atacama (b) veld (c) prairies (d) campos B. Fil...