AP BIOLOGY

Detailed explanation-1: -In higher plants, the cell wall is made up of mainly cellulose and hemicellulose. Pectins are usually found in parenchyma, but additional materials are deposited on the cell wall according to the function, e.g., pectin in collenchyma, lignin in sclerenchyma, and suberin in cork cells.

Detailed explanation-2: -Collenchyma walls have a similar composition to primary cell walls (Jarvis, 1992). These cell walls surround growing cells and are made up of cellulose microfibrils embedded in a hydrated matrix of complex polysaccharides classified as hemicelluloses and pectins (Cosgrove, 2005).

Detailed explanation-3: -Pectin is a component of the cell walls of plants that is composed of acidic sugar-containing backbones with neutral sugar-containing side chains. It functions in cell adhesion and wall hydration, and pectin crosslinking influences wall porosity and plant morphogenesis.

Detailed explanation-4: -Collenchyma tissue is composed by elongated living cells of uneven primary thick walls, which possess hemicellulose, cellulose, and pectic materials.

Detailed explanation-5: -Final answer: The chloroplasts containing simple tissues showing thickening at the corners with cellulose, hemicellulose, and pectin are collenchyma. Q. Q.