Answer:
Saliva
Lipase
Amylase
Trysin
Pepsin
Erepsin
Explanation:
Substances? Just any substances?
Answer:
Pulmonary artery
Explanation:
The pulmonary artery delivers oxygen poor blood to the lungs that comes from the right ventricle of the heart. The pulmonary artery is also the only artery in the body that carries unoxugenated blood. When the blood goes to the lungs, it picks up oxygen and drops off carbon dioxide to be expelled from the body. The pulmonary vein then takes the oxygen-rich blood and brings it back to the heart.
Hydrogen bonds are totally different to both covalent bonds and ionic bonds. Hydrogen bonds are intermolecular bonds, that means they occur in between two molecules. ... When H atom is close to O,F, N atoms those atoms can attract H atoms electrons temporarily, thus making a weak bond.
https://www.quora.com/How-and-why-is-centrifugation-used-in-DNA-extraction
I think this should help. I'm sorry i didn't give a proper answer. Feel free to delete/report if this didn't help.