A small number of birds arrive on an island from a neighboring larger island. This small population begins to adapt to the new food plants available on the island, and their beaks begin to change. About twice a year, one or two more birds from the neighboring island arrive. What effect do these new arrivals have? O A. Their arrival represents a colonizing event. O B. Their arrival will likely prompt genetic drift. O C. Their arrival tends to retard adaptation to the new food plants. O D. Their arival speeds the process of speciation. O E. Their arrival tends to promote adaptation to the new food plants.

A small number of birds arrive on an island from a neighboring larger island. This small population begins to adapt to the new food plants available on the island, and their beaks begin to change. About twice a year, one or two more birds from the neighboring island arrive. What effect do these new arrivals have? O A. Their arrival represents a colonizing event. O B. Their arrival will likely prompt genetic drift. O C. Their arrival tends to retard adaptation to the new food plants. O D. Their arival speeds the process of speciation. O E. Their arrival tends to promote adaptation to the new food plants.

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter11: Evolution And Its Processes

Section: Chapter Questions

Problem 6RQ: Galapagos medium ground finches are found on Santa Cruz and San Cristóbal islands, which are...

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A population of bats becomes isolated after colonizing an island, developing a high incidence of a negatively-impacting recessive genetic disorder not present in the original population they diverged from, or in the bats that originally colonized the island. What is the likeliest cause? a. Genetic drift b. Gene flow c. Founder effect d. Natural selection
Cana a change in the physical enviroment of a population result in evolution by natural slection?(hint: remember the peppered moth's camouflage and color changes of tree bark due to pollution)
gentic drift is A. genetic change in an indivdual's lifetime b genetic change over time c. The change in genetic composition of populations over time d. Evolution that happens on a indvidual
slands are well known for having many endemic (unique) species. What is a likely explanation for this pattern? A. Humans bring partly or fully domesticated species with them when they arrive on islands. B. Colonizers encounter fewer competitors on an island, so they can diversify. C. Islands are more complex habitats than continents are, so they have more niches for specializations. D. Colonizers are likely to have more diversity than local populations and thus outcompete them. E. The type of organism that is a good colonizer has more than the average amount of genetic variability, so it's more likely to speciate.
Tawilis is a freshwater sardine endemic only in the Taal Lake in Batangas province. After several eruptions of the Taal volcano in the 21st century, the sardine population mentioned above rapidly dropped up to 82%. What best describe this scenario? a. mutation b. migration c. natural selection d. genetic drift
Mutation (a) leads to adaptive evolutionary change (b) adds to the genetic variation of a population (c) is the result of genetic drift (d) almost always benefits the organism (e) a and b
If a populations allele and genotype frequencies remain constant from generation to generation, (a) the population is undergoing evolutionary change (b) the population is said to be at genetic equilibrium (c) microevolution has taken place (d) directional selection is occurring, but only for a few generations (e) genetic drift is a significant evolutionary force
Galapagos medium ground finches are found on Santa Cruz and San Cristóbal islands, which are separated by about 100 km of ocean. Occasionally, individuals from either island fly to the other island to stay. This can alter the allele frequencies of the population through which of the following mechanisms? a. natural selection b. genetic drift c. gene flow d. mutation
A severe fire or flood kills 90% of a population of squirrels in a forest. The remaining squirrels evolve into a population quite distinct from the original. In another forest, a bacterial infection kills 90% of the squirrels in the forest, and the remaining squirrels also evolve into a distinct population. The first instance is considered genetic drift, and the second is natural selection. Explain the difference.
What is Macroevolution? A) The change of a population over several generations B) The history of a species from its origin C) The history of all populations and their descendants
Due to its ability to camouflage itself from predators, the White Peppered Moth of England was once much more abundant than the Black Peppered Moth. As the Industrial Revolution hit, factories began to release black soot which coated everything, including tree bark. Because the moths’ habitat was now darker, the white moth became much more susceptible to predators. At the same time, the Black Peppered Moth was now more protected and began to increase in number.This story is an example of A. natural selection. B. extinction. C. endangered species. D. mutation.
Which of the following would be described as genetic drift?a. the distribution of species resulting from the movement of the continents as they dispersed from Pangaeab. random mating that occurs in a large populationc. the random changes that might occur in a gene pool as the result of a natural disaster that significantly reduced the size of a populationd. the change in allele frequencies that result from sexual selection