BIO 148 DECK EXAM Questions With Verified Answers 100% Rated A+

BIO 148 DECK EXAM Questions With Verified Answers 100% Rated A+ Which option is most likely to be an example of a density-independent factor limiting population size? a. High predation b. Disease transmission c. Limited forage d. Weather conditions - Answer- d. Weather conditions How does logistic growth differ from geometric/exponential growth? a. Population growth rate is constant for logistic growth b. Population growth rate declines as population size reaches carrying capacity c. Population growth rate increases as population nears carrying capacity d. Population declines over time - Answer- b. Population growth rate declines as population size reaches carrying capacity An allele is: a. A disconnected part of a metapopulation b. A cause of extinction in small populations c. A version of a gene that encodes a particular variant of the protein that the gene encodes d. A life-stage of an insect species that disperses away from its birthplace - Answer- c. A version of a gene that encodes a particular variant of the protein that the gene encodes What are the four key processes determining population growth? a. Births, deaths, adolescence, senescence b. Immigration, emigration, dispersal, deaths c. Births, immigration, dispersal, speciation d. Births, deaths, immigration, emigration - Answer- d. Births, deaths, immigration, emigration Which type of population growth, if left unchecked, would quickly overwhelm the Earth? a. Logistic growth b. Exponential growth - Answer- b. Exponential growth If a population is experiencing density dependence, a. Birth and death rates are not related to population density b. Birth and/or death rates are dependent on population density - Answer- b. Birth and/or death rates are dependent on population density Individuals in a population have different reproductive rates and survival probabilities based on: a. All of the options are possible causes of these differences b. Individual life stage c. Individual size d. Individual age - Answer- a. All of the options are possible causes of these differences There are four key processes in evolution. Three are: natural selection, gene flow, and genetic drift. What is the fourth? a. Reproduction b. Dispersal c. Mutation d. Immigration - Answer- c. Mutation What are the three types of natural selection? a. Strong, weak, disruptive b. Directional, weak, stabilizing c. Disruptive, directional, stabilizing d. Stabilizing, strong, weak - Answer- c. Disruptive, directional, stabilizing How many mass extinctions are there thought to have been? a. 0 b. 15 c. 5 d. more than 100 - Answer- c. 5 Why are organisms never perfectly adapted to their environments? a. All of the options contribute b. Evolutionary history constrains what new traits can emerge c. There are trade-offs between e.g., reproductive performance and survival d. Environmental conditions are a moving target because they are always changing - Answer- a. All of the options contribute Which is not an effect of genetic drift? a. Random loss of alleles that reduces genetic diversity b. Increase of harmful alleles in small populations c. Increased genetic differences between populations through random loss and fixation of alleles d. Favoring of traits that confer better survival and reproduction - Answer- d. Favoring of traits that confer better survival and reproduction Mutations occur due to: a. All of the options b. Exposure to radiation c. Exposure to mutanogenic chemicals d. Errors in DNA copying during cell division - Answer- a. All of the options What are the two key components of the idea: descent with modification? a. Inheritance of ancestral features that are altered over time by evolution b. Genetic drift and gene flow c. Reduction in genetic diversity after natural selection d. Speciation and extinction - Answer- a. Inheritance of ancestral features that are altered over time by evolution What does Darwin's metaphor of the tangled bank tell us about evolution? a. The complexity of nature means evolution is random and directionless b. Organisms evolve in isolation, independent of other species c. Evolution can't be attributed to any one thing d. Evolution is shaped by ecological interactions among organisms and their environment - Answer- d. Evolution is shaped by ecological interactions among organisms and their environment What type of evolutionary change is happening in this figure showing mandible (beak) width in birds that survived and perished during a drought? a. Directional selection b. Mutation c. Disruptive selection d. Genetic drift - Answer- c. Disruptive selection