Choose all the answers that apply. which of the following are used by scientists to classify organisms? 1. dna 2. physical characteristics 3. embryo development 4. color 5. behavior

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.