Navigation » List of Schools » Los Angeles Valley College » Anthropology » Anthropology 101 – Human Biological Evolution » Spring 2021 » Unit 2 Exam
Below are the questions for the exam with the choices of answers:
Question #1
A when interbreeding between two different species results in less successful hybrid offspring.
B because there is over-population and species survival depends on a new species evolving.
C when there is extensive gene flow within a single species.
D males and females don’t like each other very much and so prefer not to mate.
Question #2
A is not the only pattern of speciation observed in the natural world.
B one possible explanation of speciation accepted by biologists today, is not the only pattern of speciation observed in the natural world and is called the theory of phyletic gradualism.
C one possible explanation of speciation accepted by biologists today.
D is called the theory of phyletic gradualism.
Question #3
A microevolution.
B gradualism.
C punctuated equilibrium.
D parallel evolution.
Question #4
A new mutations are usually maladaptive.
B gene flow between individuals within the population keeps them similar to each other.
C environments change slowly.
D natural selection is a powerful process.
Question #5
A gene flow among members of the same species.
B genetic drift within populations.
C sexual selection between two different species
D they way natural selection favors particular traits suited to a specific ecological niche.
Question #6
A adaptive radiation.
B parallel evolution.
C generalization.
D homology.
Question #7
A extinction
B sympatric speciation.
C migration
D allopatric speciation.
Question #8
A small scale evolutionary changes within a single generation
B how the evolution of one species affects the evolution of another species
C the relationship between humans and other animals in their ecological niche
D large scale evolutionary change such as speciation
Question #9
A evolutionary change within a species.
B the formation of new species.
C the death of individuals in a group.
D the extinction of a species.
Question #10
A the appearance of new species
B any type of genetic mutation
C the change in allele frequencies from one generation to the next
D the change from one species to another in one generation
Question #11
A mutation
B gene flow
C All of these forces may disrupt equilibrium.
D genetic drift
Question #12
A the production of new genetic material
B the exchange of genes between populations
C the differential reproductive success of individuals
D the chance loss of alleles in a population
Question #13
A adaptive changes in gene frequencies.
B maladaptive changes in gene frequencies.
C changes in gene frequencies that are random with respect to adaptation.
D equilibrium in genetic frequencies.
Question #14
A small populations.
B large populations.
C medium-sized populations.
D populations out of equilibrium.
Question #15
A mutation
B migration
C recombination
D genetic drift
Question #16
A all of these are important in shaping continuously varying traits
B are affected by genes at many loci.
C can be greatly impacted by the environment during an individual’s growth and development.
D are shaped by many genes, each with only a small effect on the phenotype.
Question #17
A natural selection
B migration
C genetic drift
D mutation
Question #18
A New variation is slowly added by mutation.
B Mutations can be hidden in the heterozygous genotype.
C All of these are ways that genetic variation remains within a population.
D There is no blending during sexual reproduction.
Question #19
A were discovered by Darwin.
B do not differ between male and female animals.
C the somatic cells of the body.
D the sex cells or eggs and sperm.
Question #20
A genetic drift
B mutation
C gene
D allele
Question #21
A One chromosome from each homologous pair is passed on to gametic cells during meiosis.
B Hereditary material is contained in the chromosomes.
C Chromosomes come in pairs.
D These are all true about choromsomes
Question #22
A dominant trait
B mendelian trait
C non-genetic trait
D polygenic trait
Question #23
A a large number of the birds had died as a result of the drought
B The Grants found all these things as part of their study.
C beak size is inherited so the next generation had a larger average beak size
D the survivors of the drought had a larger average beak size
Question #24
A changed over time because of environmental change
B never changed because of stasis
C never changed because of high juvenile mortality
D changed because equilibrium existed in the population
Question #25
A disruptive selection
B averaging selection
C directional selection
D stabilizing selection
Question #26
A cannot be passed from parent to offspring.
B are components of organisms that enable them to survive and reproduce.
C allow organisms to evolve more rapidly.
D almost always occur by chance alone.
Question #27
A there are no differences in the traits to be favored and affect survival and reproducation.
B there is no competition.
C evolutionary change would proceed in a nonadaptive direction.
D traits are not inherited by offspring.
Question #28
A variation in fitness.
B Natural selection is based on all three of these answers.
C the struggle for existance.
D the inheritance of variation.
Question #29
A individuals with useful adaptations will be more likely to survive and reproduce.
B while organisms within a population reproduce rapidly, resources are limited.
C all of these are essential elements of natural selection.
D individuals within a population vary.