Pine Bark: A 2- to 3-inch layer of pine bark is good for weed control. Pine bark makes an attractive, usually dark-colored mulch. It can be purchased in various particle sizes, from shredded to large-sized particles, called nuggets. Large pine bark nuggets float in water and may not stay in place during a heavy rain.
Rough endoplasmic reticulum is a cell organelle that helps in protein synthesis as well as packaging of materials into lysosomes and secretory activities of cell.ough endoplasmic reticulum is so called because its outer surface  is studded with ribosomes. These ribosomes serve as the sites for  the translation of RNA into proteins. â¦ The primary function of the  rough endoplasmic reticulum is protein synthesis.
There are two types of endoplasmic reticulum, rough and smooth. The outer (cytosolic) face of the rough endoplasmic reticulum is studded with ribosomes that are the sites of protein synthesis.he smooth endoplasmic reticulum (abbreviated SER) has functions in several metabolic processes. It synthesizes lipids, phospholipids, and steroids. Cells which secrete these products, such as those in the testes, ovaries, and sebaceous glands have an abundance of smooth endoplasmic reticulum.