Question

which scenario represents the bottleneck effect in evolution?
a. drastic reduction in population size leading to limited genetic diversity
b. large - scale changes within a species
c. increased genetic diversity due to migration
d. a small group establishes a new population elsewhere

which example illustrates microevolution?
a. the extinction of dinosaurs
b. the change in coloration of peppered moths during the industrial revolution
c. the development of new species from a common ancestor
d. the migration of birds to new habitats

mutations serve as the ultimate source of:
a. genetic diversity
b. environmental adaptation
c. species diversity
d. microevolution

macroevolution involves:
a. interbreeding of distinct species
b. changes in allele frequencies within a population
c. formation of entirely new species over extended periods
d. small - scale changes within a species

Explanation:

• First question: The bottleneck effect is defined as a drastic reduction in population size leading to limited genetic diversity.
• Second question: Microevolution refers to small - scale changes within a species. The change in coloration of peppered moths during the Industrial Revolution is a classic example of microevolution as it shows a change in allele frequencies within a population of moths.
• Third question: Mutations are the ultimate source of genetic diversity as they introduce new genetic variations into a population.
• Fourth question: Macroevolution involves the formation of entirely new species over extended periods.

Answer:

• First question: A. Drastic reduction in population size leading to limited genetic diversity
• Second question: b. The change in coloration of peppered moths during the Industrial Revolution
• Third question: a. Genetic diversity
• Fourth question: c. Formation of entirely new species over extended periods