The American Alligator is one of the largest reptiles in the world weighing from 450 to 500 pounds. The length of an adult varies from 13 to 18 feet. The tail is about half of the length. The alligator and the crocodile are very similar in appearance but there is a difference. The crocodile has a di...

The Membrane The membrane has a double lipid layer through which fat- soluble substances will move, by passive transport or diffusion. The molecules will only move through if they are small enough. There are globular protein regions, which are hydrophilic. These regions allow water and water ...