"Readers are shown examples of invasive snakes [and] frogs ... to reveal the pattern of species introduction and habitat takeover. Identifying the adaptations of species like the cane toad, the title teaches students to compare the strengths and weaknesses of Earth's animals. The susceptibility of habitats such as Florida's emphasizes the delicacy of the food chain. By analyzing and comparing cases of invasive species, readers discover how humans impact the natural world and the work that must be done to keep the balance"--Provided by publisher.
Describes the physical characteristics, behavior, and habitat of the only large wild cat, other than the American cougar, that is not spotted or striped.
Explains how heredity influences the way people look, the health problems they might get, and the ways they might be similar to other members of their family, and describes how heredity was discovered.
Explains the role DNA and genes play in humans and animals, describes how the structure of DNA was discovered, and explores recent advances in genetic research.
An introduction to cloning that explains the science behind cloning cells, people, and animals and discusses its medical, legal, and ethical ramifications.
