Natural Selection

Which of the following best illustrates natural selection?

• A community whose members work together utilizing all existing resources and migratory routes.
• An organism with favorable genetics variations will tend to survive and breed successfully.
• A population monopolizes all of the resources in its habitat, forcing other species to migrate.
• The largest organisms in a species receive the only breeding opportunities

How does this process allow for natural selection?

• It increases genetic diversity.
• It produces organisms identical to the parent.
• It produces more offspring
• It leads to over-reproduction.

Plants in areas with short growing seasons often have more chloroplasts in their cells than plants in areas with long growing seasons. Which of the following best describes a difference between the two types of plants?

• Plants in areas with short growing seasons have a lower rate of cellular respiration.
• Plants in areas with short growing seasons metabolize proteins more quickly.
• Plants in areas with short growing seasons grow taller.
• Plants in areas with short growing seasons make food more quickly.

In 1850 there was a large snowshoe rabbit population in Manitoba, Canada. Over the years, the winter coloration (the color of the rabbit's fur) of the surviving rabbit population changed. The graph shows the change in winter coloration of rabbits between 1850 to 2000.  
Based on the data, we could hypothesize that:

• the winters are longer in length
• the snowshoe rabbit has migrated to another area
• the amount of snow cover decreased over the years
• more snowshoe rabbit predators have moved into Manitoba

Convergent evolution is responsible for the development of _______ structures.

• Homologous
• Analogous
• Vestigial
• homeopathic

_______ and _______ are structures observed in organisms that have a common ancestor.

• Homologous and Vestigial
• Analogous and Vestigial
• Homologous and Analogous

The longer embryos look similar in the developmental stages suggest ....

• a distant common ancestor.
• a more recent common ancestry.
• nothing, because evolutionary linage can't be determined by looking at embryonic development.

Bird wings and butterfly wings are an example of

• Homologous structure
• Analogous structure
• Mimicry
• Camoflague

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Individuals within a population can evolve.

• True
• False

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An organism's ability to survive and reproduce in its environment refers to its

• Fitness
• Variation
• Selection
• Mutation

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