AP BIOLOGY

Detailed explanation-1: -The husk of coconut is made up of Sclerenchyma tissues. It is a simple permanent tissue. Cells are long with tapering ends and have a thick cell wall made of lignin. These cells are generally dead and do not contain protoplasm.

Detailed explanation-2: -The coconut husk is composed of 30% fiber and 70% pith, with high lignin and phenolic content (Panyakaew and Fotios, 2011). Due to the high lignin content, coconut fiber is very elastic, durable, and resistant to rotting.

Detailed explanation-3: -These are typically found mostly in fruit walls of nuts, the coconut husk, the legume seed coat, etc.-Collenchyma in dicot plants is located in the hypodermis which provides the plant with mechanical assistance.

Detailed explanation-4: -Flax. Flax bast fiber cells are an ideal example of sclerenchyma fibers, with extraordinary cell wall thickness and length. Their major function is to provide strength to the long (1 m) and thin (2 mm) flax stem.

Detailed explanation-5: -Answer: The coconut husk is composed of sclerenchyma tissue.