What are polymers?
1.) long chains of carbon molecules
2.) long chains of halogen molecules
3.) small groups of halogen molecules
4.) small groups of carbon molecules

How have the greenhouse gasses increased from the year 2000 to 2018

Astring vibrates with a frequency of 10 hz. why can't a person hear the sound waves produced by the vibrating string, no matter how large the amplitude of the waves? out! this is homework and due tomorrow! you so much!

Why is it possible for different microorganisms to extract energy not only from carbohydrates and other biological molecules but from a large variety of substances?