PCA Exam Correct Questions & Answers(Verified)

. The nonliving components of an ecosystem are called: A. Biotic compounds B. Abiotic compounds C. Mineral components D. Environmental components - ANSWER B. Abiotic compounds 8. Which of the following ecological concepts is illustrated in a food web? A. Population equilibrium B. mutualism C. Biogeochemical cycles D. Competition - ANSWER B. mutualism 9. What is a limiting factor? A. A biotic factor that stops the growth of a plant of animal B. A factor that is required for the growth and survival of an organism C. One of many soil nutrients that regulates the growth of a plant D. An action made by a consumer that limits the population size of a species - ANSWER B. A factor that is required for the growth and survival of an organism 10. The mean population level around which a species' characteristic abundance fluctuates is the species? A. Density dependence B. Equilibrium position C. Population density D. Abundance level - ANSWER B. Equilibrium position 11. Many agricultural pest species such as foliar pathogens, aphids, mites and small seeded weeds are considered: A. S strategists B. K strategists C. R strategists