Biology EOC study guide| 88 Questions | With Complete Solutions

In a hypothesis identify both the IV and DV correct answer: Independent variable: the variable that is being tested dependent variable: the variable that is being measured What are the steps of the scientific method? correct answer: observation, research, form hypothesis, experiment, conclusion, share results What is the difference between independent and dependent variables? In a graph? correct answer: Independent variable: the variable that is being tested (x axis) dependent variable: the variable that is being measured (y axis) What is the importance of a control when testing a hypothesis? correct answer: to have a comparison it is the group that does not get tested on What factors should be held constant in a sample experimental design? correct answer: constants: factors that are the same in each experiment What is biodiversity? How is it measured? correct answer: biodiversity: the amount of variation of all organisms in the biosphere the higher the biodiversity the healthier If a population of keystone species is increasing what can you infer about the health of the ecosystem? correct answer: The ecosystem is healthy Autotroph correct answer: An organism that makes its own food Heterotroph correct answer: An organism that cannot make its own food. Chemotrophs correct answer: obtain energy from chemicals In a food web identify primary, secondary and tertiary consumers correct answer: How much energy is passed from one trophic level to the next? correct answer: 90% is lost as heat 10% is passed onto the next trophic level What is carrying capacity? How do biotic and abiotic limiting factors affect carrying capacity? correct answer: the largest population that an environment can support at any given time; depending on how many abiotic/biotic factors are present can effect the ability of an ecosystem to efficiently support a population primary succession correct answer: succession that occurs on surfaces where no soil exists secondary succession correct answer: type of succession that occurs in an area that was only partially destroyed by disturbances What is biomagnification? correct answer: buildup of pollutants at higher levels of the food chain What is the difference between renewable and nonrenewable resources? correct answer: renewable: can be produced within a reasonable time nonrenewable: cannot be reproduced within a reasonable time Why is acid rain becoming a bigger problem? correct answer: humans are burning a lot of fossil fuels