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Questions and Answers
Life on Earth, which emerged more than 3.7 billion years ago, is immensely ______. Biologists have sought to study and classify the various forms of life, from prokaryotic organisms such as archaea and bacteria to eukaryotic organisms such as protists, fungi, plants, and animals.
diverse
Energy processing is also important to life as it allows ______ to move, grow, and reproduce. Finally, all ______ are able to regulate their own internal environments.
organisms
Biologists are able to study life at multiple levels of ______, from the molecular biology of a cell to the anatomy and physiology of plants and animals, and evolution of populations.
organization
Biology is the ______ of life. It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field.
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All organisms are made up of ______ that process hereditary information encoded in genes, which can be transmitted to future generations. Another major theme is evolution, which explains the unity and diversity of life.
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