In science writing, what is the purpose of historical points of reference? to help readers connect prior knowledge to new discoveries

to help readers sympathize with past scientists

to help readers understand an especially difficult concept or idea

to help readers understand the complete history of a scientific idea

Which strategy is an example of how companies may upgrade themselves to meet changing customer preferences? a.doing door-to-door sellingb.using billboards to advertise the productsc. making online shopping services availabled.giving discounts on products

Ascientist wants to determine the effect of a new type of gasoline. he fillsone car with normal gasoline and another identical car with the new gasoline.which is the control group? a. the new type of gasolineb. the car with the normal gasolinec. the car with the new gasolinethe amount of gasoline usedd. the amount of gasoline used

Body systems are not completely independent they integrate and work together describe one example of the integration between body systems