The students in mrs. smith's class tested various paper towel brands for strength. the students collected data after they each performed the same experiment with the different brands. when comparing results; bounty came out on top. how do we know the test results were valid?

How do living things obtain phosphorus

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.

Why is a mushroom considered a heterotroph