Through a microscope, an unidentified cell was discovered to lack chloroplasts. what does this discovery indicate?

When were criminals first used to create a system to catch other criminals

Carbon tetrachloride is a toxic liquid. a carbon tetrachloride molecule has one atom of carbon and four atoms of chlorine. what is its chemical formula?

How is citizenship achieved in the united states? check all that apply. citizenship by birth citizenship by residency citizenship by naturalization citizenship by employment citizenship by immigration