21. Which polysaccharide is the most abundant on the planet, gives structure to plants, can be digested by
Cows, and serves as dietary fiber in animals?
or

22. Sugars dissolve in water, and are therefore said to be
"water-loving"

23. Lipids are said to be hydrophobic. Explain what that means?
are a way for plants and animals to store extra energy,
for some animals, such as seals in the arctic, and can provide cushion

24. Macromolecules called
provide
around internal organs.

25. How many different amino acids are there?