Distinguish between adaptive radiation and convergent evolution. Which statement is TRUE?
Both adaptive radiation and convergent evolution result in homologous structures.
Adaptive radiation involves unrelated species evolving similar traits, while convergent evolution involves diversification from a common ancestor.
Adaptive radiation is driven by genetic drift, while convergent evolution is driven by natural selection.
Adaptive radiation involves diversification from a common ancestor, while convergent evolution involves unrelated species evolving similar traits.
Related Questions
What is the primary outcome of adaptive radiation?
Decreased biodiversity.
Increased competition.
Increased biodiversity.
Stabilization of the environment.
Which of the following is NOT a characteristic of adaptive radiation?
Common ancestry of the diversifying species
Phenotype-environment correlation
Trait utility
Slow and gradual evolutionary change over long periods
Which of the following pairs of structures best exemplifies analogous organs?
Human arm and whale flipper
Horse leg and human leg
Wings of a bat and wings of an insect
Human appendix
Darwin's finches on the Galapagos Islands exhibit diverse beak morphologies adapted to different food sources. Which of the following BEST describes the genetic mechanism underlying this diversification, assuming the ancestral finch population had limited beak variation?
Horizontal gene transfer from other bird species introduced new beak morphologies.
Hybridization between different finch species generated novel beak shapes.
Mutations in regulatory genes controlling beak development led to variations upon which natural selection acted.
Environmental factors directly induced heritable changes in beak structure.
Adaptive radiation is often observed in situations where:
The environment remains stable for long periods
Strong competition exists within a well-established ecosystem
A new ecological opportunity arises, such as colonization of a new island
Species are highly specialized to a particular niche
The process by which different type of finches were evolved in Galapagos islands is
Adaptive radiation
Geographic similarity
Geographic dissimilarity
Unadaptive radiation
Which of the following statement is correct?
The area of a circle can be expressed in terms of its circumference, but the volume of a sphere cannot be expressed in terms of its surface area.
The area of a circle cannot be expressed in terms of its circumference, but the volume of a sphere can be expressed in terms of its surface area.
Neither the area of a circle can be expressed in terms of its circumference, nor the volume of a sphere can be expressed in terms of its surface area.
Both the area of a circle can be expressed in terms of its circumference, and the volume of a sphere can be expressed in terms of its surface area.
Development of different functional structures from a common ancestral form is called
Differential evolution
Adaptive radiation
Non-adaptive radiation
Regressive evolution
Adaptive radiation is characterized by rapid diversification. Which ecological factor is LEAST likely to be a primary driver of rapid adaptive radiation?
Colonization of a new, geographically isolated environment
Mass extinction events creating vacant ecological niches
Evolution of a key innovation that allows exploitation of new resources
Stable environmental conditions over long periods
How might an evolutionary biologist explains why a species of birds has evolved a larger beak size?
Large beak size occurred as a result of mutation in each member of the population
The ancestors of this bird species encountered a tree with larger than the average sized seeds. They needed to develop larger beaks in order to eat the larger seeds and over time, they adapted to meet this need
Some members of the ancestral population had larger beaks than others. If larger beak size was advantageous, they would be more likely to survive and reproduce. As such, large beaked birds increased in frequency relative to small beaked birds
There is no way to explain such phenomenon in evolutionary terms
