Would you classify coral polyps as a keystone species

What does resonance result in? quieter sounds frequency amplitude louder sounds

Witch type of microscope is used to view very small cell components like proteins and dna?

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.