Blood Suckers Case Study

Evolution is defined as _____.

• apes slowly turning into men
• new species of organisms being created
• a change in the gene pool over time
• existing species of organisms going extinct

In certain areas of the world, having blue eyes is considered an attractive trait for humans. Over time, you would expect the number of genes for blue eyes to _____.

• Increase
• Decrease
• Stay the same
• change randomly

Which of the following mechanisms of evolution is the only one that leads to adaptation?

• small population size
•  sexual selection
• mutation
• natural selection

Organism A and organism B are experimentally mated in the lab, but sperm is unable to fertilize the egg. What type of reproductive isolation does this suggest?

• pre-zygotic
• post-zygotic
• probiotic
• azygotic

Two organisms are considered to be of the same species if _____.

•  they look alike
• they are able to produce offspring
• they share similar habitats
• they are able to produce fertile offspring

__________ speciation usually occurs because two populations of a species are separated from one another by some geographic divide that prevents interaction of the populations.

•  sympatric
• allopatric
• St. Patrick
• anopatric

How do you think the London population of C. molestus first arose?

• Some individuals of C. molestus from elsewhere in Europe were accidently carried/migrated to London
• A.Some individuals of C. pipiens from aboveground London moved into the underground tunnel system, where nature selected for traits beneficial for the underground environment.
• A.Both A and B are possible.
• Neither A or B are possible

Which of these do you think best represents the divergence of C. molestus from C. pipiens, as described by Byrne and Nichols?

• Sympatric
• Allopatric
• Peripatric
• .both A & B

If C. molestus was a founder population that derived from the surface C. pipiens population, you would expect _____ genetic diversity in the C. molestus population as compared to C. pipiens?

• more
• less
• the same

It appears that C. molestus and C. pipiens are different species caused by _____ reproductive isolation.

• pre-zygotic
• post-zygotic
• probiotic
• nomadic