Which of the following is a large scale environmental impact caused by the shipment of material across the world ocean?

a. decreased world temperatures due to the ships burning fuels

b. increase population size of humans due to the material being transport

c. potential of waste and sewage dumping from the ships into the ocean

d. the decrease of dolphin populations across the oceans

Which of the following is not a main characteristic that scientists focus on when determining which kingdom an organism belongs to

The body is protected against harmful flu viruses by

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.