Ecology Exam Review

1) Invasive species are described as all of the following EXCEPT 45 Quickly reproduce Populations difficult to control Few natural predators Native species 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

2) The most important organism in the nitrogen cycle is… 45 Bacteria Plants Herbivores decomposers 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

45 3) As DDT, a persistent chemical, changes in concentration as it moves through trophic levels in a process called Dissolution Bio magnification Disassociation Bio accumulation 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

4) True or False: Sun energy cannot be created or destroyed, but it can be recycled 45 True False 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

5) No two animals can occupy the same place at the same time is called 45 Niche Habitat The dominance factor Competitive exclusion principle 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

6) A group of different species living together 45 Community Population Commensalism Ecosystem 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

7) Which of the following is a factor that may cause global warming 45 Ozone hole CO2 emissions Recycling Species extinction 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

8) An ecosystem rarely has more than______ tropic levels due to energy lose between levels. 45 3 5 7 9 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

9) All of the following are greenhouse gases EXCEPT 45 Methane CO2 Nitrogen Water vapor 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

10) A pH of 7 is considered Acidic Basic Ridiculous Neutral 45 1 2 3 4 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

11) The pH of normal rain is around 45 pH 7 pH 9 pH 3 pH 5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

45 12) The abundance of different species in an ecosystem is a measure of that ecosystem’s Population Size Density Biodiversity 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

13) The chemical responsible for the hole in the Ozone layer was 45 CO2 CH4 R2D2 CFC’s 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

14) For an ecosystem to function it must have 45 Producers and consumers Decomposers and producers Consumers and decomposers Heterotrophs and omnivores 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

15) A product of respiration is… 45 Water Sugar Methane CFC’s 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

16) A reactant in the process of photosynthesis is…. 45 Water Sugar Methane CFC’s 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

45 17) The symbiotic relationship between a leech and a human is most likely an example of Predation Mutualism Parasitism Commensalism 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

45 18) There are 220 maple trees in a 10 km2 area of Brandywine State Park. What is the population density? 22 maples 220 maples per km2 2200 maples per km2 22 maples per km2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

19) Which of the following is a biotic factor? 45 Plant life Soil type Water Temperature 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

45 20) The series of changes that occurs in an area that was originally bare rock is called Population growth Primary Succession Competition Environmental Alteration 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

21) A condition that can restrict a population’s growth is… 45 Carrying capacity Biotic potential Limiting factor Poor hygiene 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

22) The largest population an environment can support is…. 45 Biotic potential Carrying capacity Exponential Growth Mutualism 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

23) The arrows found in a food web represent 45 Herbivores Decomposers Competition Energy flow 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

24) _____ gets its energy directly from the sun. 45 A grasshopper A rose A battery A lizard 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

25) Which of the following resources is non-renewable 45 Coal Wind Solar Nuclear 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24