Models need to be changed when

a.) they are based on experimental data.
b.) scientific understanding changes.
c.) they represent a phenomenon.
d.) they are designed to answer a question

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from

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.

What if the yeast were extremely active and produced more than 100ml gas. would you know? why/why not