You work in a laboratory facility. Someone is conducting experiments in the next lab. You hear a noise that sounds like "pop," followed by the crash of glass. As you approach the lab door, you notice a foul smell coming from under the door. You shout through the closed door but get no answer. You call 9-1-1 or the designated emergency number. What should you do next?

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.

Which of the following would involve looking at different structures of organisms and comparing how similar they are? a. vestigial structuresb. radiometric datingc. homologous structures

Many humans consume both plants and animals. these humans are considered to be which of the following? herbivores carnivores omnivores