Rough endoplasmic reticulum contains ribosomes, while smooth endoplasmic reticulum does not contain ribosomes. The ribosomes are what give rough endoplasmic reticulum its characteristic "roughness."
Tadpoles use GILLS to obtain oxygen
A body of water that has experience eutrophication has way to many nutrients and minerals in it. This is caused from factory, agriculture,and road run off. It causes an excessive growth of plants in the body of water basically. Some of the minerals and nutrients include Sodium triphosphate and Phosphorus<span />
Cells are limited in size because the outside also known as the plasma membrane must transport food and oxygen to the inside of the cell. This can be represented by what is known as the surface to volume ratio.