Evolution part 2

What increases genetic variation when animals move  from one population to another

• genetic drift
• sexual selection
• bottleneck effect
• gene flow

Mutations are important because they bring about

• death of the organism in which they develop
• genetic variation needed for a population to evolve
• benefits for the individual, not for the population
• Hardey-Weinberg equilibrium within a population

What is speciation?

• combining of tow species to form one with different traits
• isolation that affects mating behaviors
• timing of mating that prevents normal sexual selection
• divergence of two or more species from an existing one

An earthquake causes an ocean channel top open and separate an island into two.  the species on each section are now in

• geographic isoliation
• behavioral isolation
• disruptive selection
• temporal isolation

What kid of isolation occurs when two populations of birds have different courtship dances?

• geographic
• sexual
• temporal
• behavioral

How would you describe this evolution?

• Homologous structure
• Analogous structure
• Structural adaption
• Functional adaption

Which of the following explains how natural selection causes a trait to become predominant in a population?

• Individuals with traits that are favorable to the environment reproduce more.
• Traits of an individual change in order to adapt to changes in enviornment.
• organisms select which traits they wish to inherit
• all of these answers

Why would a population with a large amount of genetic variation be more likely to survive a severe climate change in its environment?

• Individuals will only create offspring well-suited to the climate change
• The individuals would produce more offspring
• Individuals better suited to the new climate will help less-suited individuals survive
• Some individuals will posses traits better suited to the new climate and be more likely to pass them on

The differences shown among the various kinds of giraffes is known as ___.

• adaptability
• fitness
• variation
• natural selection

The coat color of rock pocket mice in New Mexico's Valley of Fire changed over time from light to dark color. This was because ___.

• individual mice decided to change their coat color to avoid detection
• the lighter colored mice blended in better with the lava rock
• the darker colored mice were more likely to pass on their genes
• of industrial melanism