Please give me the correct responses. Only answer if you're very good at science/biology. Please don't put links to websites or else I'll report you. Scientists believe Polar Bears have evolved from a group of Brown Bears that became an isolated population during a time when the Earth's climate began cooling down. What are some adaptations that make Polar Bears different from Brown Bears and what do you think caused the adaptations to occur?​

What is the difference between bacterial infections and viral infections?

Environmental differences within ecosystems are generally caused by

In 2015, about ten percent of total u. s. energy consumption was from renewable energy sources. renewable energy plays an important role in reducing greenhouse gas emissions. when renewable energy sources are used, the demand for fossil fuels is reduced. sanjay and his family want to cut back on their use of non-renewable resources at home. they are thinking of an alternate way to heat their home without adding more greenhouse gases or pollutants to the environment. which renewable resource would not fit into their plan? a) solar power b) burning wood c) constructing a wind turbine eliminate d) generating hydroelectric power