Biodiversity: concept, patterns, importance, loss
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See all →- Match List I with List IIList I: A. Robert May; B. Alexander von Humboldt; C. Paul Ehrlich; D. David TilmanList II: I. Species-Area relationship; II. Long term ecosystem experiment using out door plots; III. Global species diversity at about 7 millio… Answer: 3. A-III, B-I, C-IV, D-II Key idea: link each scientist with the idea they are known for. Robert May: global species diversity about... 1
- Tropical regions show greatest level of species richness becauseA. Tropical latitudes have remained relatively undisturbed for millions of years, hence more time was available for species diversification.B. Tropical environments are more seasonal.C.… Answer: 2. A, C, D and E only Key idea: tropics have more species because they are stable, predictable and energy rich. A (long undisturbed... 1
- These are regarded as major causes of biodiversity loss:A. Over exploitationB. Co-extinctionC. MutationD. Habitat loss and fragmentationE. MigrationChoose the correct option: Answer: 1. A, B and D only Key idea: the "evil quartet" of biodiversity loss is habitat loss and fragmentation, over-exploitation, alien spe... 1
- Which of the following statements is correct? Answer: 3. Biomagnification refers to increase in concentration of the toxicant at successive trophic levels. Key idea: Look at each stateme... 1
- Given below are two statements:Statement I: Electrostatic precipitator is most widely used in thermal power plant.Statement II: Electrostatic precipitator in thermal power plant removes ionising radiationsIn the light of the above statements, choose… Answer: 4. Statement I is correct but Statement II is incorrect. Key idea: An electrostatic precipitator removes particulate matter, not rad... 1
- The thickness of ozone in a column of air in the atmosphere is measured in terms of : Answer: 2. Dobson units Key idea: Ozone thickness in a column of air is measured in Dobson units (DU). Kilobase measures DNA length, decibel... 1