Give two examples of friction being a useful force

What claim did thorne make? what evidence supported his claim?

Describe how alleles and genes are related

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants. d- food molecules are broken down in the cells if living things.