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Ecosystem Balance. Test Review. Question 1 (6 Points). List, in order , the 6 communities in primary succession from the pioneer community to the climax community. Lichen. a. Pioneer Community: ______________ b. _______________________________ c. _______________________________
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Ecosystem Balance Test Review
Question 1 (6 Points) • List, in order, the 6 communities in primary succession from the pioneer community to the climax community • Lichen • a. Pioneer Community: ______________ • b. _______________________________ • c. _______________________________ • d. _______________________________ • e. _______________________________ • f. Climax Community: _______________ • Grasses • Shrubs • Heath Mat • Pine Trees • Hardwood Trees
Question 2 (4 Points) • Besides humans, what are 4 factors that can influence the stability of an ecosystem? • Answer: • Biotic, abiotic, patterns of energy, nutrient cycling, communities, and food webs
Question 3 (3 Points) • How does primary succession differ from secondary succession? • Answer: • Primary – organisms and soil is gone • Secondary – only organisms gone
Question 4 (2 Points) • In what biome do we live? • Answer: Deciduous Forest
Question 5 (2 Points) • Which biomes have the most biomass? • Answer: Forest
Question 6 (2 Points) • Which biome covers the largest land area? • Answer: Desert
Question 7 (2 Points) • What is a biome? • Answer: Largest category scientists use to classify ecosystems
Question 8 (2 Points) • Why are herbivores not considered to be parasites? • Answer: They don't live on or in the bodies of plants
Question 9 (2 Points) • Which symbiotic relationship helps one species and does not harm or help the other? • Answer: Commensalism
Question 10 (1 Points) • A relationship between species in which one species benefits and the other is harmed is called? A. Parasitism B. Commensalism C. Mutualism D. Symbiosis
Question 11 (1 Points) • Elephants and rhinos tolerate the small birds that ride their backs and eat insects o their skin. The relationship between the elephants and the birds is an example of? A. Parasitism B. Commensalism C. Mutualism D. Symbiosis
Question 12 (1 Points) • An increase in a predator population will directly result in A. Decline in prey population B. Decreased predation C. Starvation D. Ecosystem balance
Question 13 (1 Points) • The size of the host population controls A. the geographic range of parasites B. important bodily functions C. the size of the parasite population D. the size of the prey population
Question 14 (1 Points) • You would be most likely to find populations of host organisms parasitized when A. they have little to eat B. they cannot escape C. they are diseased D. they are overcrowded
Question 15 (1 Points) • Mutualism is often the result of A. coevolution B. symbiosis C. fierce competition D. cooperation
Question 16 (1 Points) • Parasitism is an example of A. coevolution B. symbiosis C. ecosystem balance D. predation
Question 17 (1 Points) • A defining characteristic of a climax community is that it is essentially A. sedimented B. stable C. forested D. grassy
Question 18 (1 Points) • The first organisms to colonize a newly formed lifeless habitat are part of A. a shoreline ecosystem B. secondary succession C. primary succession D. mature communities
Question 19 (1 Points) • Aquatic succession typically begins A. on the surface of a lake B. at the shoreline of a lake C. at the bottom of a lake D. in the middle of a lake
Question 20 (1 Points) • Which type of disturbance would most likely result in secondary succession A. rainfall creates a new lake at the top of a mountain B. glacier retreats leaving barren rock C. a volcanic eruption D. an earthquake
Question 21 (1 Points) • Why do new species often form on new islands? A. New islands have a lot of vegetation B. There is increased competition C. Their populations explode D. They evolve to fill new niches
Question 22 (1 Points) • When applied to ecology, what does the new field of mathematics called chaos theory imply? A. Ecosystems are really not balanced B. Organisms are constantly changing to meet new conditions C. One small change in an ecosystem can lead to drastic results D. Ecosystems are really not balanced
Question 23 (1 Points) • The kind of biome that will develop in an area is determined mainly by temperature and A. pressure habitats B. precipitation C. average wind speed D. organisms present
Question 24 (1 Points) • The biome with the greatest species diversity is the A. rain forest B. deciduous forest C. wetlands D. tundra
Question 25 (1 Points) • Which of the following biomes receives the least amount of rainfall? A. tropical dry forest B. tundra C. chaparral D. shrubland
Question 26 (1 Points) • In which biome does fire play an important part in maintaining ecosystems? A. tropical dry forest B. tundra C. chaparral D. shrubland
Good Luck! • And STUDY!!!