1. what is a macromolecule? name four macromolecules present in all living things and identify what they have in common.

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."