MC1
____________________ is an accidental change in DNA.
A. Genetic drift
B. Artificial selection
C. Mutation
D. Natural selection
C. Mutation
When the environment changes too quickly for an organism to adapt, what will occur?
A. genetic drift
B. extinction
C. speciation
D. evolution
B. extinction
The change of organisms over large periods of time.
Evolution
A human directed selection of plants and animals.
Artificial selection
Which of the following best describes a successful individual in evolutionary terms?
A. A successful individual possesses traits that are different from the traits of the rest of the population.
B. A successful individual produces many offspring that possess unique traits.
C. A successful individual will be well adapted to its environment and produce a few high quality offspring.
D. A successful individual is well adapted to its environment and produces offspring that survive to pass on genes.
D. A successful individual is well adapted to its environment and produces offspring that survive to pass on genes.
In the history of the world, how many mass extinctions have occurred?
A. 5
B. 13
C. 7
D. 10
A. 5
Biological evolution that occurs by chance.
Genetic drift
When new species are generated.
Speciation
You visit the state fair and see a display of 17 breeds of chicken. These chickens are the result of
____________________.
A. Mutation C. Natural selection
B. Artificial selection
C. Natural selection
D. Genetic drift
B. Artificial selection
In the example above, one lemur species eats only bamboo shoots. Bamboo shoots contain a high level of cyanide, a toxic chemical. This lemur species has developed a tolerance for a certain amount of cyanide. What do you think will happen over time?
A. The level of cyanide in the bamboo population will increase.
C. The level of cyanide in the lemur population will decrease.
B. The level of cyanide in the bamboo population will remain the same.
D. The level of cyanide in the bamboo population will decrease.
A. The level of cyanide in the bamboo population will increase.
A sequence of DNA that codes for a trait or a protein.
Gene
Process by which traits improve the chances of an organism for survival and reproduction.
Natural selection
In a mass extinction, the rate of extinction exceeds _______
A. 85%.
B. the rate of background extinction.
C. 99%.
D. the rate of environmental change.
B. the rate of background extinction.
Which best describes evolutionary success?
A. A successful organism possesses adaptive traits and produces more offspring than survive.
B. A successful organism produces more offspring than others in the population.
C. A successful organism possesses adaptive traits and is able to pass those traits on to numerous offspring which then reproduce.
D. A successful organism possesses traits that are different from traits in the rest of the population and that allow the organism to compete more successfully.
C. A successful organism possesses adaptive traits and is able to pass those traits on to numerous offspring which then reproduce.
A heritable trait that increases an individual fitness.
Adaptation
The disapperance of a species from Earth.
Extinction
A reintroduced population of wolves in a national park is 90 percent grey and 10 percent black, consistent with the wolf population in other regions. After several generations in isolation, the national park’s wolf population is 60 percent grey and 40 percent black. The wolf population has likely experienced ________
A. Genetic drift.
B. Mutations.
C. Migration.
D. Natural selection.
A. Genetic drift.
Around 65 million years ago, 95 percent of the planet’s species were wiped out, and the age of the dinosaurs ended. Which of the following best explains why we still have numerous species today?
A. The species that exist today evolved from surviving species to fill niches left vacant by the dinosaurs.
B. The species that exist today have the potential to be as numerous as the ones that went extinct.
C. The species that exist today were those that were not wiped out when the dinosaurs died.
D. The species that exist today speciated due to separation among different populations.
C. The species that exist today were those that were not wiped out when the dinosaurs died.
A change in the DNA.
Mutation
How reproductively successful an organism is in its environment.
Fitness