Bio 173 Final Review - Winter 2024 Ecological diversity - Correct Answers Communities of different species of plants and animals living in an ecosystem.Species interactions - Correct Answers The relationships among organisms of different species living in the same location.Community composition - Correct Answers The identity and relative abundances of all taxa in a community.Interspecific competition - Correct Answers Competition between individuals of different species.Intraspecific competition - Correct Answers Competition between individuals of the same species.Interference competition - Correct Answers When one organism physically and directly restricts another organism's access to resources.Exploitative competition - Correct Answers Individuals indirectly compete over resources.Competition - Correct Answers (-/-) Both organisms are negatively affected and fitness is reduced.Mutualism - Correct Answers (+/+) Both organisms benefit while interacting with one another.Commensalism - Correct Answers (+/0) One organism benefits, the other neither benefits nor suffers.Amensalism - Correct Answers (-/0) One organism is harmed, the other remains unaffected.Predation - Correct Answers (+/-) One organism, the predator, kills and eats another organism, the prey.Parasitism - Correct Answers (+/-) One organism, the parasite, lives inside or on another organism, the host, causing it harm. 1 / 2
Independent variable - Correct Answers The variable being manipulated by the researcher.Dependent variable - Correct Answers The variable predicted to be affected in an experiment.Positive control - Correct Answers A group in an experiment that receives a treatment with a known result.Negative control - Correct Answers A group in an experiment that is NOT changed/does not receive treatment. Do not expect change.Hypothesis testing - Correct Answers Possible explanation leading to testable prediction. Includes cause and effect. Based on observations. Not an if-then statement. Must be falsifiable. Tested with an experiment.Null hypothesis - Correct Answers A hypothesis that states that there is no relationship between two specified populations.de Wit Replacement Series - Correct Answers Widely used technique to assess the resource use and productivity in systems with competing species (especially plants). It is also very useful to evaluate the interspecific and intraspecific competition in different species. Can be drawn and visualized.Monoculture - Correct Answers Only one species is present and cultivated in an area. Common form of agriculture.Mean - Correct Answers The average of a data set, found by adding all numbers together and then dividing the sum of the numbers by the number of numbers.Median - Correct Answers The middle number; found by ordering all data points and picking out the one in the middle.Mode - Correct Answers The most common number that appears in the set of data.Variance - Correct Answers S^2 = (Σ(xi - x)^2)/(n-1), average degree to which each value differs from the mean.
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