Illegal drugs such as marijuana, cocaine, and methamphetamine aren't the only drugs that are harmful to fetal development; Commonly used over-the-counter medicines, along with substances such as caffeine and alcohol, can have lasting effects on an unborn child.
A quadruped is an animal that normally walks or runs on four legs. The word comes from the Latin words quad (four) and ped (foot).A quadruped is a land mammal that walks on four feet.The term quadruped has its root in Latin language - quad meaning four, and ped meaning feet - so the term literally means four feet..umans, for instance, have four limbs, but only two of those limbs are used for walking, therefore humans fall into the category of a biped-an animal that uses two legs to travel. Notably, birds are also considered bipedal. The word quadruped is from the Latin words quad (four) and ped (foot).
All of these animals are tetrapods, but none is a quadruped. Even snakes, whose limbs have become vestigial or lost entirely, are nevertheless tetrapods. Most quadrupedal animals are tetrapods but there are a few exceptions. For example, among the insects, the praying mantis is a quadruped. tetrapod is any member of the taxonomic unit Tetrapoda (which is defined by descent from a specific four-limbed ancestor) whereas a quadruped actually uses four limbs for locomotion. Not all tetrapods are quadrupeds and not all quadrupeds are tetrapods.