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Pre-Admission Exam Science

Question 8 of 60

Question: The North American beaver and South American capybara live in two different regions of the world. However, they share some anatomical characteristics and live in similar environments. This is best explained by the idea that they:

• Descended from similar ancestors, but humans brought them to another place where they changed slightly.
• Descended from a common ancestor, which accounts for the similarity in traits.
• Descended from different ancestors and developed similar traits through random chance.
• Descended from different ancestors, but because of similar selective pressures, both evolved similar traits.

Answer: Descended from different ancestors, but because of similar selective pressures, both evolved similar traits.

Question 9 of 60

Question: If a scientist wanted to make multiple copies of a short DNA segment, which of the following techniques would be used?

• Polymerase Chain Reaction (PCR).
• Restriction Digest.
• Gel Electrophoresis.
• Recombinant DNA Technology.

Answer: Polymerase Chain Reaction (PCR).