Rough endoplasmic reticulum contains ribosomes, while smooth endoplasmic reticulum does not contain ribosomes. The ribosomes are what give rough endoplasmic reticulum its characteristic "roughness."
Try using your on opinion and see what you can come up with and good luck
Northern hemisphere : Summer because it is tilted towards the sun.
Southern Hemisphere : Winter because it is tilted away from the sun.
Well, I think it would be most likely Athletic Ability.
