A Closer Look at Living Things (Introduction to Biology) by Michael Anderson

By Michael Anderson

Existence is available in all shapes and kinds, and residing entities live in all kinds of habitats. There are seven features that each one lifestyles types sharethe skill to maneuver, to feel, to breathe, to devour meals, to develop, to breed, and to excrete waste topic. entire with annotated illustrations that make clear complicated buildings and lifestyles methods, this quantity surveys the components, features, and classifications of varied residing issues and explores the evolution of existence regularly.

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For example, the same streamlined shape for high-speed motion in seawater evolved independently at least four times: in prehistoric reptiles; in tuna, which are fish; and in dolphins and seals, which are mammals. 50 evolution And the history of life on eArth Life on Other Planets? No one knows if extraterrestrial life, or life that originated beyond Earth, exists or ever existed. The branch of biology concerned with extraterrestrial life, from microscopic organisms to intelligent beings, is called exobiology or astrobiology.

ATP captures chemical energy obtained from the breakdown of food molecules and releases it to fuel other cellular processes. Cells require chemical energy for three general types of tasks: to drive metabolic reactions that would not occur automatically; to transport needed substances across membranes; and to do mechanical work, such as moving muscles. ATP is not a storage molecule for chemical energy; that is the job of carbohydrates and fats. But when energy is needed by the cell, it is converted from storage molecules into ATP.

In the human body, for example, these elements, together with carbon, make up about 96 percent of the body’s weight. Oxygen and hydrogen are highly important in body processes that obtain and use energy 33 A Closer look At living things The elements oxygen and hydrogen help the human body absorb and process important nutrients found in food and water. com 34 Cells, tissues, And orgAns from food. Water, a compound of oxygen and hydrogen, plays a very important role in life processes. Large amounts of nitrogen are found in protein, or body-building compounds.

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