So, what is Two-Factor Authentication? As its name indicates, two-factor authentication focuses on the authentication process, one of the most crucial aspects of account security. This process keeps unauthorized people out of your accounts and personal information.
Turtles are the only reptiles with a shell. Some turtles can pull their head, legs, and tail into the shell for protection. There are about 250 species of turtles. They live on land, in fresh water, and in the ocean.f air temperatures do not suit them, some reptiles can hibernate until the temperatures are right again. Another unique characteristic of reptiles is their eyes. The shape of a reptile's pupil, the black spot in the center of the eye, indicates whether the animal is active at night or during the day.
Anatomy and Physiology of Animals/The Skin - The Skin. 1  Skin comes in all kinds of textures and forms. There is the dry warty skin of toads and crocodiles, the wet slimy skin of fish and frogs, the hard shell of tortoises and the soft supple skin of snakes and humans. Mammalian skin is covered with hair, that of birds with feathers, and fish and reptiles have scales.