Question

read this excerpt from \dna testing.\ dna samples from insects preserved in amber can date back to before the time of the dinosaurs, which died out 65 million years ago. george poinar of oregon state university, for example, has even extracted muscle tissue from a 125 - million - year - old lebanese weevil. this is, says poinar, \the best preserved protein on the face of the earth.\ so far, dna has been successfully extracted from about a half dozen ancient samples in amber. select the most accurate summary of kakus argument. ○ amber has allowed scientists to study dna that has been preserved over millions of years. ○ ambers preservative uses have been studied and explained by scientists at oregon state university. ○ amber is an effective preservative for lebanese weevils, as proven by ancient samples extracted by scientists. ○ amber can preserve dna over millions of years; this suggests a new method for preserving culture far into the future.

Explanation:

• Analyze Option 1: The excerpt talks about DNA from insects in amber (dating back millions of years) being studied (e.g., extracted by Poinar and others). This matches the idea of amber allowing study of DNA preserved over millions of years.
• Analyze Option 2: The excerpt focuses on DNA extraction from amber, not amber's preservative uses being studied/explained by Oregon State scientists. Eliminate.
• Analyze Option 3: The excerpt is about DNA in general from ancient samples, not just Lebanese weevils. Eliminate.
• Analyze Option 4: The excerpt has no mention of preserving culture. Eliminate.

Answer:

A. Amber has allowed scientists to study DNA that has been preserved over millions of years.