Which ecological unit exists as an interdependent system made up of the physical environment and a living community functioning together? A) habitat
B) ecosystem
C) food chain
D) population

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

How does natural selection change thephenotypes within a population over time?

Which of the following can be reduced by the use of renewable energy sources? a. social costs b. economic costs c. environmental costs d. all of the above select the best answer from the choices provided a b c d