What are the 3 things substances are classified as?

Why does asexual reproduction result in offspring with identicle genetic variation

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.

What prefix multiplier is appropriate for reporting a measurement of 5.57 ×10−5 m?