This quiz contains questions from the following topics of Environment IGNOU book.
C1: Origin of Earth and Evolution of the Environment
C2: Environment and Human Society
C3: Degradation of Natural Environment
C4: Principles of Ecology
C6: Natural Ecosystem
C7: Human Modified Ecosystems
C8: Human Societies
C9: Deforestation
C10: Environmental Pollution
Statement 1: Photosynthesis in plants primarily utilizes carbon dioxide and releases oxygen.Statement 2: Oxygen content in the Earth’s atmosphere is about 21% due to photosynthesis by plants.
Statement 1: The discovery of fire by early humans was primarily for cooking purposes.Statement 2: The use of fire led to a cultural evolution in humans.
Statement 1: The overuse of chemical fertilizers in agriculture leads to soil pollution.Statement 2: Chemical fertilizers increase the nutritional value of crops.
Statement 2: Secondary succession occurs in areas where the existing community has been removed.
Statement 1: The pyramid of energy in an ecosystem can never be inverted.Statement 2: In some aquatic ecosystems, the pyramid of biomass can be inverted.
Statement 1: An ecosystem’s energy flow is unidirectional and always proceeds from producers to consumers.Statement 2: In a food web, a species can belong to multiple trophic levels.
Statement 1: Biodiversity hotspots are regions with a high level of species richness and endemism.Statement 2: Deserts are usually rich in biodiversity and have a wide variety of plant and animal life.
Statement 1: Mangrove forests act as a natural barrier against coastal erosion.Statement 2: Alpine ecosystems are typically found at low altitudes and are characterized by dense tree cover.
1. Aquaculture contributes significantly to the destruction of mangrove forests.2. A major advantage of aquaculture is its minimal impact on native aquatic biodiversity.Which of the statements given above is/are correct?
1. Urban ecosystems have the highest population density compared to other human-modified ecosystems.2. Urban ecosystems are characterized by a lack of biodiversity and a dependence on external resources for survival.Which of the statements given above is/are correct?
1. Biodiversity hotspots are regions with a high level of endemic species.2. Biodiversity hotspots have already lost at least 70% of their original habitat.Which of the statements given above is/are correct?
1. Carbon dioxide is the only greenhouse gas that significantly contributes to global warming.2. Methane is over 20 times more effective in trapping heat in the atmosphere than carbon dioxide over a 100-year period.Which of the statements given above is/are correct?
1. Deforestation in tropical regions is a primary cause of yearly increase in flood disasters.2. Overgrazing is not a significant contributor to deforestation.Which of the statements given above is/are correct?
1. India’s forest cover is just over 20% of its total geographical area.2. The main cause of deforestation is agricultural expansion.Which of the statements given above is/are correct?
1. Air pollution can lead to respiratory problems and cardiovascular diseases.2. Noise pollution has negligible effects on human health.Which of the statements given above is/are correct?
1. Soil pollution is majorly caused by industrial activities and improper waste disposal.2. Pesticides and heavy metals in soil do not significantly impact plant growth and animal health.Which of the statements given above is/are correct?
Time’s up
