AP BIOLOGY

Detailed explanation-1: -Collenchyma tissue is composed by elongated living cells of uneven primary thick walls, which possess hemicellulose, cellulose, and pectic materials. It provides support, structure, mechanical strength, and flexibility to the petiole, leaf veins, and stem of young plants, allowing for easy bending without breakage.

Detailed explanation-2: -The plant cell wall predominantly consists of pectin, hemicellulose and cellulose.

Detailed explanation-3: -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-4: -Final answer: The chloroplasts containing simple tissues showing thickening at the corners with cellulose, hemicellulose, and pectin are collenchyma. Q. Q.