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American Public University BIO 101 Quiz 3

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Question;Part 1 of 4 - 20.0/ 25.0 PointsQuestion 1 of 20 5.0/ 5.0 PointsExponential growth can only occur when: A. a population experiences extreme competition for resources. B. the birth rate is less than or equal to the death rate. C. growth conditions are ideal. D. the rate of increase of the population is negative.Question 2 of 20 5.0/ 5.0 PointsThe death rate of a population is referred to as: A. survivorship. B. life expectancy. C. opportunistic. D. mortality.Question 3 of 20 5.0/ 5.0 PointsThe major density dependent limiting factor in populations is: A. intraspecies competition. B. parasitism. C. weather conditions. D. predation.Question 4 of 20 5.0/ 5.0 PointsUniform distribution patterns for a population are: A. relatively rare in nature. B. due to one organism not influencing another organism?s growth pattern. C. best for animals that hunt and care for their young together. D. due to unevenly distributed resources in an environment.Question 5 of 20 0.0/ 5.0 PointsWhich of the following IS NOT considered a population? A. all of the humans in the world B. all of the protozoans in the gut of one termite C. all of the cliff swallows on a particular mountain D. all of the plants growing in a specific fieldPart 2 of 4 - 20.0/ 25.0 PointsQuestion 6 of 20 5.0/ 5.0 PointsA decomposer obtains its food from: A. fallen leaves and bodies of dead animals. B. eating other organisms. C. photosynthesis. D. the sun.Question 7 of 20 5.0/ 5.0 PointsWhich of the following organisms is a primary consumer? A. a cow B. a flowering plant C. a lion D. an oak treeQuestion 8 of 20 0.0/ 5.0 PointsWhich of the following would represent an ecosystem? A. oak trees, grass, roses, shrubs B. the sun, the temperature, amount of rainfall, type of soil C. oak trees, beetles, squirrels, robins D. the sun, amount of rainfall, oak trees, beetles, squirrelsQuestion 9 of 20 5.0/ 5.0 PointsWhich of the following organisms is an autotroph? A. an insect B. a decomposer C. a producer D. a consumerQuestion 10 of 20 5.0/ 5.0 PointsIn the food web involving the green heron, a flea, a sunfish and algae, which organism would have the greatest biomass? A. the flea B. the algae C. the green heron D. the sunfishPart 3 of 4 - 20.0/ 25.0 PointsQuestion 11 of 20 5.0/ 5.0 PointsWhich of the following DOES NOT affect the temperature and rainfall of an area? A. the amount of solar radiation that reaches the area B. the number of different species in an area C. the geographical features of the Earth such as mountains and valleys D. the global atmospheric and oceanic circulation patternsQuestion 12 of 20 0.0/ 5.0 PointsBecause of the rain shadow effect on mountains: A. the air traveling down the leeward side cools and it loses moisture as precipitation. B. the air traveling up the windward side cools and it picks up moisture. C. the air traveling up the windward side cools and it loses moisture as precipitation. D. the air traveling down the leeward side cools and it picks up moisture.Question 13 of 20 5.0/ 5.0 PointsWhen the sun?s rays strike the northern hemisphere more directly, it experiences: A. winter. B. the rainy season. C. the dry season. D. summer.Question 14 of 20 5.0/ 5.0 PointsA savanna: A. is wet all year long. B. contains some of the richest soil on the earth. C. is home for mainly tree living animals. D. is an open grassland with scattered shrubs and trees.Question 15 of 20 5.0/ 5.0 PointsAs the latitude increases from the equator: A. the angle at which the sun?s rays strike the Earth increases, and the climate is colder. B. the angle at which the sun?s rays strike the Earth decreases, and the climate is colder. C. the angle at which the sun?s rays strike the Earth decreases, and the climate is warmer. D. the angle at which the sun?s rays strike the Earth increases, and the climate is warmer.Part 4 of 4 - 25.0/ 25.0 PointsQuestion 16 of 20 5.0/ 5.0 PointsWhich of the following nonrenewable resources IS NOT a mineral? A. lead B. zinc C. oil D. ironQuestion 17 of 20 5.0/ 5.0 PointsWhat does a biogas machine use for fuel? A. animal manure B. coal C. hot water D. windQuestion 18 of 20 5.0/ 5.0 PointsThe introduction of certain inorganics such as nitrogen and phosphorus into a lake: A. stimulate the growth of plants in the lake and causes the water to become clearer and better for recreational uses. B. causes the death of all the plant species in the lake and causes the water to become clearer and better for recreational uses. C. stimulates the growth of plants in the lake and eventually transforms the lake into a marsh. D. causes the death of all the plant species in the lake and eventually transforms the lake into a marsh.Question 19 of 20 5.0/ 5.0 PointsWhen an oyster contains high concentrations of heavy metals even though it is living in water with relatively low concentrations of the metals, this is an example of: A. eutrophication. B. thermal pollution. C. biological concentration. D. biological magnification.Question 20 of 20 5.0/ 5.0 PointsA new form of hydropower called wave power uses: A. the vertical motion of sea waves to turn a turbine. B. hot water pumped from under the ocean to turn a turbine. C. wind to turn a turbine. D. water stored behind a dam to turn a turbine.

 

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