Which scientist determined the basic structure of nucleotides that make up DNA?

Chargaff

Levine

Watson

Wilkins

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

For a comparative or experimental investigation, scientists often make a testable about a scientific question, and then they test it in the investigation. a. control b. hypothesis c. procedure d. system

Select all that apply. careful listening skills include: refraining from interrupting the speaker taking quality notes making an effort to understand maintaining eye contact with the speaker