<span>Rough ER is called rough because it has ribosomes attached to its surface. The double membranes of smooth and rough ER form sacs called cisternae. Protein molecules are synthesized and collected in the cisternal space/lumen. When enough proteins have been synthesized, they collect and are pinched off in vesicles.</span>
Transpiration occurs on plants. So the answer is D. Leaves
The myelin sheath (C) insulates the axons.
The myelin sheath is a fatty substance, hence why it is great for insulation. <span />
Hair, skin, glands, nerves, and nails. And also it’s main function is to act as a barrier to protect the body from the outside world.
