1. Which ecological principle does an energy pyramid represent?

1. Which ecological principle does an energy pyramid represent? http://prntscr.com/23w8prA. Large amounts of energy are lost in the transfer between trophic levels.B. The ultimate source of energy in the biosphere is the sun.C. Consumer organisms are more important than producer organisms.D. Most producer organisms use photosynthesis to create organic compounds.2. Which of the following is a density-dependent limiting factor on the Florida manatee population?A. hot ocean watersB. cold stressC. bacteriaD. water salinity3. Which is not a major biogeochemical cycle?A. oxygen cycleB. biosphere cycleC. nitrogen cycleD. carbon cycle4. Which parameter of the hydrosphere does not change?A. temperature vs. depth at low latitudesB. density vs. depth at low latitudesC. surface temperatures from low to high latitudesD. temperature vs. depth at high latitudes5. What does the phrase trophic level mean?A. number of organisms at each stage in the food chainB. level on the food chainC. complex relationships that form food webs from various food chainsD. which species any given predator preys on6. What did environmental scientists learn about succession from observing the Mount Saint Helens eruptions of 1980?A.Only invading species from outside the disturbed area participate in succession.B. Succession involves both biological legacies and invading species.C. Succession theory predicted exactly how Mount Saint Helens would recover.D. Succession is a steady progression that, once started, goes to a predictable conclusion.7. Which strategy would have the least positive impact on life expectancy?A. mechanizing agricultureB. vaccinating against childhood illnessesC. replacing hunting and gathering with agricultureD. removing sanitation facilities8. Which process is the fastest at releasing oxygen into the atmosphere?A. aerobic respirationB. weatheringC. photosynthesisD. decay9. What type of population growth is affected by carrying capacity?A. logarithmic growthB. exponential growthC. logistic growthD. linear growth10. Distribution of thermal energy across latitudes involves interaction between the hydrosphere and what other sphere?A. biosphereB. cryosphereC. atmosphereD.geosphere11. Which is an example of a population migrating in response to environmental stress?A. A polar bear needs a wide territory to find sufficient prey.B. Bats sleep during the day and fly from their shelters at night.C. A cactus species distribution changes over time when the average temperature in its former habitat becomes too high.D. Honeybees pollinate bluebonnet flowers, helping the bluebonnets thrive in their native environment.12. What does primary productivity measure?A. rate of loss of energy in an ecosystemB. number of organisms in an ecosystemC. weight of all organisms in an ecosystemD. rate at which an ecosystem produces chemical energy from sunlight13. What is an ecosystem?A. group of interacting populations in a defined place and the nonliving factors that affect themB. all the animal and plant species within a geographical areaC. classification for a broad type of habitat, such as savanna or tropical forestD. all the members of one species living in one place and time