BIO - Summarize the roles cell walls and vacuoles play in regulating plant

Summarize the roles cell walls and vacuoles play in regulating plant form by describing: how cell walls limit plant cell growth; how walls and vacuoles act to maximize plant contact with the environment. To do this, begin by describing the structural features of cell walls and telling why contact with the environment is both a favorable and risky prospect for plants; then explain the quantitative basis for maximizing environmental contact.