What's an description for the rough & smooth er

Rough ER is involved in some protein production, protein folding, quality control and despatch. It is called ‘rough’ because it is studded with ribosomes

Smooth ER is associated with the production and metabolism of fats and steroid hormones. It is ‘smooth’ because it is not studded with ribosomes and is associated with smooth slippery fats.

a community that experiences major changes undergoes progress

he movement of air through earth's or any planet's atmosphere is called wind, and the main cause of earth's winds is uneven heating by the sun. this uneven heating causes changes of atmospheric pressure, and winds blow from regions with high pressure to those with low pressure.

i hope this : )