How do scientists classify stars?

What is the function of the pigment melanin in the skin?

Daniel is researching the migration patterns of blue whales. Which of the following will Daniel use to find the most reliable information on his topic? a. an online journal b. an acclaimed movie c. a letter to the editor d. a scientific article

A double-blind study is one in which neither the researchers nor the subjects know who is receiving the real treatment and who is receiving the placebo. why are studies designed in this way?

What two particles make up the nucleus of an atom?

Which body has a period of rotation of 1 day A. Earth B. The Moon C. The Sun D. Jupiter

True or False: Keep all flammable materials off stove tops, when Madeline cooks. Danielle knows this is a safety precaution.

Which types of mutations in the lac operon stop escherichia coli from utilizing lactose as a carbon source?

Which of the following protists have cells with chloroplasts? plasmodiums amoebas euglenas paramecia

Which of the following perspectives is primarily based on the underlying belief that abnormality is caused by disturbances in the pattern of interactions and relationships with siblings, parents, children, and partner?

What is the role of DNA in a cell that is not dividing?