Classification of Life, 2nd EditionTwenty-First Century Books, 1 янв. 2013 г. - Всего страниц: 78 How are polar bears related to pandas? For thousands of years, philosophers and scientists have tried to organize and understand, or classify, the relationships among Earth's animals and plants. Early classification systems were cumbersome and inconsistent. In the late 1720s, Carl Linnaeus began developing a classification system to describe relationships among all living things, including animals, plants, fungi, and bacteria. This organization, called the tree of life, is still the basis of the classification system used by scientists today. |
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... species. But some experts believe that as many as 100 million species may share our planet. How do we keep track of so many organisms (living things)? Scientists classify organisms, or sort them into groups, based on their similarities ...
... organisms are related to all the other organisms living on Earth? How would you know which characteristics are important to consider in your decision? Don't worry if you can't answer these questions. You're in good company. Because life ...
Melissa Stewart. scientists often have trouble deciding how organisms are related. As they learn more about living things, scientists often move organisms from one group to another. Most of these changes involve worms, insects, and other ...
... lived in Greece about 2,300 years ago. Aristotle divided all animals into two main categories: animals with red ... organisms into these groups. Before Aristotle classified an animal, he observed its body structures closely. He also ...
... live). His groups include waterfowl, wading birds, birds of prey, and perching birds. Modern scientists and bird-watchers still use these categories. Meanwhile, an Italian doctor named Andrea Cesalpino focused his studies on plants ...
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9 | |
17 | |
Classification Meets Evolution | 26 |
Adding New Kingdoms | 34 |
The Birth Of Cladistics | 40 |
Kingdoms Or Domains? | 49 |
Glossary | 62 |
Biographies | 66 |
Source Notes | 71 |
Selected Bibliography | 72 |
Further ReadingWebsites | 74 |
Index | 76 |
Photo Acknowledgments | 78 |
Back Cover | 80 |
Timeline | 64 |