PCA Exam Questions with A+ Graded Answers

PCA Exam What are important considerations when describing a population? age, distribution, birth rate A community of organisms includes all the organisms that share a habitat which of the following would be considered a density-independent factor regulation population growth extreme weather which of the following terms refers to dispersal of individuals into a population immigration an ecosystem is a community of interacting organisms and their physical environment the primary process by which energy becomes available to organisms in an ecosystem is photosynthesis the nonliving components of an ecosystem abiotic compounds which of the following ecological concepts is illustrated in a food web mutualism what is a limiting factor a factor that is required for the growth and survival of an organism the mean population level around which a species characteristic abundance fluctuates is the species equilibrium position many agricultural pest species such as foliar pathogens, aphids, mites and small seeded weeds are considered r strategists how does the amount of biodiversity in an agroecosystem compare to that of a natural, more mature ecosystem lower in an agroecosystem than a natural system the goal of pest eradication is generally to eliminate newly invading pests