Some animals, including frogs and dragonflies, change their body to live in different environments. Others, such as chameleons, change color to blend into the background to hide from predators. Still more change their shape dramatically to attract a mate-for example, the beautiful displays of birds of paradise.
The advances that have been made in the realm of genetics are astounding. Not only has the entire human genome been mapped, but scientists have also discovered methods of modifying genes in people as well as plants and animals. With this progress has come a great debate about the ethics of genetic modification. People wonder if there should be limits to altering nature. Readers explore basic co…