FREE BIOLOGY AND STUDY GAMES ABOUT BIOLOGY

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FREE BIOLOGY AND STUDY GAMES ABOUT BIOLOGY

11&12 VOCAB EXAM QUESTIONS Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -24 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation

Question 1: coevolution

Answer:

process in which 2 or more species evolve in response to changes in each other

Question 2: directional selection

Answer:

pathway of natural selection in which one uncommon phenotype is selected over 1 more common

Question 3: punctuated equilibrium

Answer:

the theory that speciation occurs suddenly and rapidly, followed by long periods of little evolutionary change

Question 4: bottleneck effect

Answer:

genetic drift, results from an event that drastically reduces the size of a population

Question 5: gene flow

Answer:

physical movement of alleles from one population to another

Question 6: endosymbiosis

Answer:

ecological relationship in which one organism lives within the body of another

Question 7: adaptive radiation

Answer:

• species evolves, gives rise to many descendant species that occupy different ecological niches

Question 8: cyanobacteria

Answer:

bacteria that can carry out photosynthesis

Question 9: founder effect

Answer:

genetic drift, occurs after a small number of individuals colonize a new area

Question 10: divergent evolution

Answer:

evolution of one or more closely related species into different species, because of adaptations to different environmetal conditions

Question 11: convergent evolution

Answer:

evolution towards similar characteristics in unrelated species, because of adaptations to similar environmental conditions

Question 12: stabilizing selection

Answer:

natural selection where intermediate phenotypes are selected over phenotypes of both extremes

Question 13: temporal isolation

Answer:

isolation between populations due to barriers related to time; such as differences in mating periods or time when individuals are most active

Question 14: sexual selection

Answer:

certain traits enhance mating success , and are therefore passed on to offspring

Question 15: allele frequency

Answer:

proportion of 1 allele, compared with all the alleles for that trait, in the gene pool

Question 16: speciation

Answer:

evolution of 2 or more species from one ancestral species

Question 17: index fossils

Answer:

fossils of an organism that existed during only specific spans of geologic time across large geographic areas

Question 18: disruptive selection

Answer:

natural selection where 2 opposite, but equally uncommon, phenotypes are selected over the most common one

Question 19: microevolution

Answer:

observable change in the allele frequencies of a population over a few generations

Question 20: behavioral isolation

Answer:

isolation between populations due to differences in courtship/mating behavior

Question 21: gene pool

Answer:

collection of alleles found in all of the individuals of a population

Question 22: geographic isolation

Answer:

isolation of populations die to the physical barriers between them

Question 23: reproductive isolation

Answer:

last stage in speciation where members of isolated populations are either no longer able to mate or no longer able to produce viable offspring

Question 24: genetic drift

Answer:

change in allele frequencies, due to chance alone, occurring most commonly in small populations