They provide the immune system with "memory" against previously encountered pathogens.
T memory cells are necessary for protective immunity against invading pathogens
rubisco incorporates co2 from the atmosphere into an organic molecules
Carbohydrates- cellulose cell wall in plants, chitin exoskeleton & fungal cell wall
Lipids- cell membrane (phospholipids)
Protein- Fibrous ( skin, fingernails, horns, feathers)
Necleic acid- stores genetic info(dna)
