II. Listen to the following words and practice their pronunciation

Abiotic, bioecology, bionomics, biotic, consumer, decomposer, ecological niche, ecosystem, energy budget, energy flow, environmental pollution, food chain, functional niche, microcalorimetry, nutrient cycling, population dynamics, primary production, producer, radioisotope, social behaviour, succession, trophic level, trophic-dynamic concept.

READING COMPREHENSION AND VOCABULARY DEVELOPMENT

I. Match each word on the left to its correct definition on the right

1) community, v 2) consumer, n 3) decomposer, n 4) distribution, n 5) niche, n 6) pollution, n 7) population, n 8) scarcity, n 9) starvation, n 10) supply, v

a) deficiency in quantity or number compared with the demand; b) the process of making air, water, soil etc dangerously dirty, or the state of being dangerously dirty; c) the natural geographic range of an organism; d) to make available for use , provide; e) the ecological role of an organism in a community especially in regard to food consumption f) an organism requiring complex organic compounds for food which it obtains by preying on other organisms or by eating particles of organic matter; g) any of various organisms (as many bacteria and fungi) that return constituents of organic substances to ecological cycles by feeding on and breaking down dead protoplasm; h) suffering or death caused by lack of food; i) a group of interbreeding organisms that represents the level of organization at which speciation begins j) an interacting population of various kinds of individuals (as species) in a common location.

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III. Fill in the spaces in the following text using a suitable form of the word given at the end of the lines. The first is given as an example	\|	II. Read the following text paying attention to the highlighted words. Explain or interpret the contextual meaning of the underlined phrases

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