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Ecology and Evolution: Population Dynamics, Species Interactions, and Ecological Concepts

A quiz on ecology and evolution, focusing on population dynamics, species interactions, and ecological concepts.

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    Ecology and Evolution: Population Dynamics, Species Interactions, and Ecological Concepts Quiz 5 YOUR NAME: This quiz will earn you up to 50 points. The deadline for submission is Sunday, March 3. I. Multiple choice : Please bold the correct response: (1 pt. each=18 pts.) (1) A reproductive isolating mechanism a. Might prevent mating b. Might act by preventing hybrids from producing fertile offspring c. Might not prevent mating but might prevent fertilization d. Might prevent potential mates from ever encountering each other e. All of the above are true Answer: e. All of the above are true (2) Speciation may arise from the evolution of different courtship displays and dances. This is an example of a. Mechanical isolation b. Reduced hybrid viability c. Hybrid sterility d. Behavioral isolation e. Sexual selection Answer: d. Behavioral isolation (3) Innate behaviors differ from learned behaviors in that a. Innate behaviors require practice, learned behaviors do not

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    b. Innate behaviors are performed the same way every time, whereas learned behaviors can be shaped by experience c. Innate behaviors are controlled exclusively by genes, whereas learned behaviors are controlled exclusively by environment d. Innate behaviors are instinctive, whereas learned behaviors are genetically programmed actions Answer: b. Innate behaviors are performed the same way every time, whereas learned behaviors can be shaped by experience (4) The main thrust of the “nature vs nurture” dichotomy is a. The importance of genes vs environmental influences on behavior b. The degree to which behavior is innate or learned c. The role of mating rituals in human behavior d. The importance of insight vs instinct in behavior e. a. and b. are correct Answer: e. a. and b. are correct (5) Within an ecosystem, each organism has a _____, an area in which it resides. Each organism plays a role within the ecosystem, which is ______. a. Community / habitat b. Habitat / niche c. Fundamental niche / realized niche d. Climax community / biotic community Answer: b. Habitat / niche (6) Which of the following would be considered a community - level ecological interaction?

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    a. symbiosis b. succession c. predation d. coevolution e. competition f. all of the above Answer: f. all of the above (7) Which of the following is a question that a population ecologist might ask? a. How does the composition of species in a community change over time? b. How does carbon flow through the ecosystem? c. Do members of two different species compete for food? d. What factors determine the distribution and abundance of organisms? e. How does the age structure of a population affect its growth rate? f. d. and e. Answer: f. d. and e. (8) Density - independent factors a. affect population growth only when population size is small b. affect mortality regardless of the population size c. alter the survivorship curve of a population d. affect population growth only when population size is large e. cause death rate to be greater than birth rate even when the population is small Answer: b. affect mortality regardless of the population size

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