Question

a student wants to investigate the difference between prokaryotic and eukaryotic cells. which question would best guide a testable scientific investigation? a. why do bacteria exist in nature? b. how does the presence of a nucleus affect how cells store dna? c. are eukaryotic cells more important than prokaryotic cells? d. should people avoid contact with bacteria?

Explanation:

A testable scientific question should be about a cause - and - effect relationship that can be measured. Option B focuses on the impact of the presence of a nucleus (a key difference between prokaryotic and eukaryotic cells) on how cells store DNA, which can be investigated through experiments. Option A is more of a philosophical or evolutionary question that may not be easily testable. Option C is a value - judgment question about the importance of cell types, not testable in a scientific experiment sense. Option D is a question about human behavior and health implications rather than a direct comparison of cell types for a testable scientific investigation.

Answer:

B. How does the presence of a nucleus affect how cells store DNA?