Answer:
Adaptations and selective breeding, if that is a choice for you.
Explanation:
The miThe migration of birds.
Bonjour,
1. Arteries carry blood from the heart to the rest of the body, whereas veins carry blood from the rest of the body back to the heart.
2. Almost all arteries carry oxygenated blood and almost all veins carry deoxygenated blood.
3. Arteries have a thick elastic muscle layer, whereas the muscle layer for veins is much thinner.
Answer:
Proteins
Explanation:
Proteins are made up of many repeating units (monomers) of amino acids that are joined by peptide bonds.
Hope this helps :)