Secrets of Animal Life Cycles (Science Secrets (Hardcover))
The six books in Science Secrets unlock these and many other basic secrets of life in simple, easy-to-read text and fascinating photographs.
tortoises, such as this one from the Seychelles Islands, can live for more than 100 years. Some are said to approach 200 years in age. Slow and Steady Humans are among the longest-lived animals. However, we are not the record breakers. Giant tortoises can live for more than 170 years. They do not become adults until they are 20 or 25. Bowhead whales have been found with harpoon heads that are over 100 years old stuck in their skin. Parrots and albatrosses are among the longest-lived birds.
beetles, and worms. Anything left by the maggots is decomposed (broken down) by bacteria and fungi to become part of the soil. The Life Spiral If an animal reproduces before it dies, it leaves more than its body behind. Each of its offspring starts a new life cycle, growing and developing, reproducing, and dying. The life cycle of one animal begins and ends, but each is part of a life spiral that goes on and on. This dead minke whale is a feast for hundreds of ghost crabs. EXPERIMENT
itself. bacterium (plural bacteria) A very tiny, simple type of living thing that has just a single cell. breed To reproduce (produce offspring). breeding ground Place where animals gather to breed. camouflage To be colored and shaped so as to blend in with the surrounding environment. cell One of the billions of tiny living parts that make up every animal or plant. A cell is the smallest unit of life. clone A living thing that is an exact copy of its parent, sharing the same DNA. cocoon A
Humans, lions, and whales are all mammals. marsupial A type of mammal that usually has a pouch where its young live for the early part of their lives. Kangaroos and opossums are marsupials. mate An animal of the opposite sex, or to pair up with another animal of the opposite sex and reproduce. metamorphosis A transformation or change in which the young form of an animal turns into a very different adult form. migration When an animal makes a regular journey between two or more different
places, often far apart to feed or to breed. molt When an animal sheds its outer skin or covering. nymph The young stage of an insect that undergoes partial metamorphosis. offspring The young of an animal. predator An animal that hunts and kills other animals for food. pregnant Carrying developing offspring inside the body. pupa A stage in the life cycle of some insects when the animal remains in one place, inside a protective casing, while its body changes from one form to another. rainy