17, Which of the following is/are among the most productive ecosystems? II. Incr

Question

17, Which of the following is/are among the most productive ecosystems? II. Increasing ocean temperature leading to increasing evaporation/cloud cover leading to net cooling by reflection of solar radiation is an example ofa: a. open ocean a. closed system b. negative feedback c coral reefs d. boreal forests e. both c and d 12. A primary consumer might primarily eat b. grass c, bacteria. d. herbivores. e secondary producens 13. Evolution by natural selection requires all but which of the following: a maintenance of genetic variation in 18. The associated figure (above) provides support for which of the following processes? b. limited resources c. physical changes d. differential reproductive success a mutualism b. competitive exclusion c. resource partitioning d. coevolution e. both a and b 14. Which of these is true: a, 10% of the energy in one trophic 19. An urban heat island is level is transferred to the next level a. an industrial space in a city in which heat is released to the surrounding structures b. the phenomenon in which cities tend to be much warmer than surrounding rural areas c. largely caused by building materials typically used in cities d. something typically observed only in developing nations e. b and c b. energy pyramids and the second law of thermodynamics demonstrate that there should be far more large predators than smaller consumers c. Secondary consumers usually eat tertiary consumers d. gross primary productivity is energy available for food to other organisms e. None of the above are true. 15. An organism's role, or lifestyle, within the structure of an ecosystem is its: 20. Which of the following is an area where primary succession would occur? a. habitat. b. trophic level. c. symbiotic relationship. a. a forest devastated by a tornado b. a sand dune near a coastline c. an area that was recently burned d. an abandoned field e. all of the above ecological niche. e. limiting resource. 16. In a pyramid of energy, the lowest quantity of energy (kcal/m2/year) would be found among the a. b. primary consumers c. secondary consumers d. tertiary consumers e. herbivores

Explanation / Answer

12) grass because primary consumer is always above autotrophs which are further eaten up by secondary consumer

14) a statement is true as only 10% energy is transfered from one tropic level to another

15) ecological niche

16) tertiary consumer because they are the last one in the food pyramid and as only 10% energy is transfered from one tropic level to the next so they will recieve least amount of energy.

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