BIO 322 Exam 2 Review Questions and 100% Correct Answers

Demographic stochasticity is? Random variability in survival and/or reproduction among individuals within a population Environmental stochasticity is? Variation in birth & death rates in response to weather, disease, competition, predation, or other factors external to the population. What does stochastic mean? randomly determined; having a random probability distribution or pattern that may be analyzed statistically but may not be predicted precisely. The Allee effect is? The positive correlation between population size and reproduction and survival of individuals. What is genetic drift? Change in gene frequencies by chance, unrelated to the alleles themselves. What is polymorphism? The fraction of examined genes for which multiple forms, or alleles exist. You are monitoring the population of the Karner blue butterfly, and you estimate with mark recapture methods that the total population size is 2540. According to a meta-analysis conducted by Frankham et al. 2014, the effective population size (Ne) is closest to: A. 32-100 B. C. D. 250-500 E. 12,500-14,700 D. 250-500 What is the mark recapture method for estimating population size EQUATION? (# originally marked)/(Population size (N))= (#marked recapture)/(# total recaptures) Which of the following is NOT a method to calculate population trends through time? Mark-capture experiment, performed one time Population viability is used to predict ________. The probability of extinction of a species.