Biodiversity: concept, patterns, importance, loss
- Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers : Answer: 2. Ozone The ozone layer absorbs harmful UV-B radiation. When ozone is depleted, more UV reaches the earth and causes skin cancers a... 1
- A river with an inflow of domestic sewage rich in organic waste may result in : Answer: 4. Death of fish due to lack of oxygen. Sewage rich in organic waste is decomposed by microbes, which use up dissolved oxygen (high... 1
- Which of the following is the most important cause of animals and plants being driven to extinction ? Answer: 3. Habitat loss and fragmentation Key idea: The most important cause of species extinction is habitat loss and fragmentation. Over-e... 1