Ecology And Environment Questions

30 Practice QuestionsStart Practicing Now

[Medium]Among the greenhouse gases contributing to global warming, which gas makes the largest relative contribution to the total greenhouse effect at roughly...
[Easy]The thinning of the stratospheric ozone layer, which increases the amount of harmful UV-B reaching the earth's surface, is caused primarily by the rel...
[Medium]Setting aside biodiversity hotspots, national parks, and wildlife sanctuaries to protect entire ecosystems and their species in their natural homes is...
[Medium]When untreated sewage rich in nutrients enters a lake and triggers explosive algal growth, the subsequent depletion of dissolved oxygen that kills fis...
[Easy]Among the causes grouped together as the 'Evil Quartet' responsible for biodiversity loss, which one is regarded as the single most important driver o...
[Easy]An age pyramid that is broad at the base and tapers sharply towards the top represents a population with which demographic future?...
[Medium]In a forest ecosystem the gross primary productivity is measured as 2,000 g per square metre per year while respiratory loss is 1,200 g per square met...
[Easy]If the producers in a grassland fix 10,000 kJ of energy, approximately how much of this energy is expected to be available at the level of secondary c...
[Hard]Unlike the carbon cycle, the phosphorus cycle lacks a significant atmospheric or gaseous phase mainly because the major reservoir of phosphorus is loc...
[Medium]Among the various ecological pyramids, which one is always upright regardless of the ecosystem because energy is lost as heat at every successive trop...
[Easy]The variation observed among the thousands of genetically different strains of the medicinal plant Rauwolfia vomitoria growing across the Himalayan ra...
[Hard]According to the species-area relationship described by the equation log S equals log C plus Z log A, the slope value Z for very large areas such as e...
[Easy]During the breakdown of detritus in an ecosystem, the step in which detritivores break down complex organic remains into smaller particles is specific...
[Medium]During primary ecological succession on a bare rock surface where no soil exists initially, which group of organisms typically acts as the pioneer com...
[Medium]A kangaroo rat surviving in the North American deserts without ever drinking water meets almost its entire requirement through which physiological ada...
[Hard]Connell's classic experiments on the rocky sea coast of Scotland demonstrated that the larger barnacle Balanus competitively excludes the smaller Chth...
[Medium]A bacterial population with an intrinsic rate of natural increase of 0.69 per hour grows exponentially; approximately how long will the population tak...
[Easy]In a lichen, a fungus and an alga live in close association where both partners derive benefit; this nutritional relationship is best classified as wh...
[Easy]The Monarch butterfly avoids being eaten by birds because its body stores a special chemical acquired during the caterpillar stage; what is the nature...
[Medium]When a population grows in a habitat with limited resources, the logistic growth curve becomes sigmoid because growth slows as the population size app...
[Easy]A community differs from a population because it includes:...
[Hard]An inverted biomass pyramid is characteristic of which ecosystem component?...
[Medium]A population of 500 grows to 620 in one year. What is the annual growth rate (%)?...
[Medium]In-situ conservation refers to:...
[Hard]Biomagnification occurs strongly with substances that are:...
[Medium]Nitrogen fixation converts atmospheric N2 into:...
[Easy]Primary succession begins on substrates such as:...
[Medium]Carrying capacity (K) in logistic growth represents:...
[Medium]The 10% law of energy transfer implies that most energy is lost as:...
[Easy]Permafrost is characteristic of which biome?...