How does the coratid artery supply nutrients to the heart? Isn't that the job of the coronary artery, to supply the heart?

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

Which greenhouse gas is emitted when burn fossil fuels for energy? a.nitrogen b.oxygen c.carbon dioxide d.helium

The pressurized plants and fungi mentioned in the video have some surprising similarities. what differences would you expect them to have?