Homework answers / question archive / Evolution, Biological Communities and Species Interactions Vocabulary: conditions, resources, optimum, range of tolerance, limits of tolerance, zone of stress, limiting factor, law of limiting factors, synergistic effects, synergisms, habitat, niche, selective pressures, natural selection, biological evolution, fitness, reproductive isolation, allopatric speciation, sympatric speciation, disruptive, stabilizing & directional selection, species, population, community, ecosystem, competition, predation, interspecific, intraspecific, mutualism, commensalism, predator, prey, carnivores, herbivores, parasites, host, pathogens, keystone species, territory, fitness, symbiosis Review Questions: 1

Evolution, Biological Communities and Species Interactions Vocabulary: conditions, resources, optimum, range of tolerance, limits of tolerance, zone of stress, limiting factor, law of limiting factors, synergistic effects, synergisms, habitat, niche, selective pressures, natural selection, biological evolution, fitness, reproductive isolation, allopatric speciation, sympatric speciation, disruptive, stabilizing & directional selection, species, population, community, ecosystem, competition, predation, interspecific, intraspecific, mutualism, commensalism, predator, prey, carnivores, herbivores, parasites, host, pathogens, keystone species, territory, fitness, symbiosis Review Questions: 1

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Evolution, Biological Communities and Species Interactions Vocabulary: conditions, resources, optimum, range of tolerance, limits of tolerance, zone of stress, limiting factor, law of limiting factors, synergistic effects, synergisms, habitat, niche, selective pressures, natural selection, biological evolution, fitness, reproductive isolation, allopatric speciation, sympatric speciation, disruptive, stabilizing & directional selection, species, population, community, ecosystem, competition, predation, interspecific, intraspecific, mutualism, commensalism, predator, prey, carnivores, herbivores, parasites, host, pathogens, keystone species, territory, fitness, symbiosis Review Questions: 1. Define and compare the terms species, population, and ecosystem. Population-all the members of one species that live in a defined area Community- all the different species that live together in a area Ecosystem- all the living and non living components of an area 2. What are selective pressures and how do they relate to natural selection? 3. Describe several types of adaptations a species might have that would allow it to survive in a dry environment. In a cold environment? 4. How may evolution lead to the development of new species (speciation)? 5. Define symbiosis, mutualism, commensalism and parasitism. How might these have evolved?

6. Describe examples of adaptations a species might have that would help it escape predation. How might these adaptations affect the evolution of a predator? 7. Describe some behaviors and/or adaptations that could lower competition intensity with another species. 8. Describe some behaviors that could lower competition intensity with members of the same species. 9. Describe an example of a keystone species. 10. Describe primary succession. Describe secondary succession. How do disturbance and resiliency play a role in either of these?