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| Question | Answer |
| Adaptation | Adaptation, in biology, the process by which a living thing becomes better suited to its environment. |
| Age | The length of time an organism has lived or normally lives, or the length of time an object or material has existed. |
| Albumin | Albumin, a simple protein found in most animals and in some plants. Albumins dissolve in water and dilute salt solutions and coagulate (curdle or clot) in the presence of heat. |
| Amino Acid | Amino Acids, chemical compounds produced by living organisms. Many amino acids are the structural units of proteins. |
| Biology | Biology, the science that deals with living things. The earth is home to a diverse range of living organisms. |
| Evolution | Evolution, as defined in biology, the continual process by which one form of life changes, or evolves, into another form. |
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Microbiology
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Microbiology, the branch of biology concerned with microorganisms including viruses, bacteria, protozoans, and certain algae and fungi. |
| Microorganism | Microorganism, or Microbe, an organism so small that it cannot be seen without the aid of a microscope. |
| Mutation | Mutation, in a general sense, any change in the genetic makeup of an organism; such a change usually causes the organism to have a trait not possessed by any of its ancestors. |
| Osmosis | Osmosis, the spontaneous flow of a liquid or gaseous substance through a semipermeable membrane. |
| Photosynthesis | Photosynthesis, the conversion of light energy into chemical energy in cells that contain chlorophyll, a green pigment. |
| Protein | Protein, a large, complex organic molecule. Proteins are found in all living cells, making up about one-half of the dry weight of most organisms. |
| Spore | Spore, a tiny reproductive body that is typically unicellular. Spores are usually produced asexually. |
| Assimilation | Assimilation, in biology, the process by which plants and animals utilize foods in the building of living tissue. |
| Balance of Nature | Balance of Nature, or Ecological Balance, the balanced relationship of the plants, animals, and other living organisms that make up a natural community. |
| Bioethics | Bioethics, the study of the ethical questions arising from biological (especially medical) research and technology. |
| Biofeedback | Biofeedback, a process in which a person can learn to influence certain bodily functions that scientists once believed were beyond conscious control. |
| Biological clock | Biological Clock, a popular term for an internal regulator responsible for various cyclical responses in living things. |
| Bioluminescence | Bioluminescence, the production of light by living organisms as the result of chemical changes. |
| Carbohydrates | Carbohydrates, a class of chemical compounds that are composed of carbon, hydrogen, and oxygen. |
| Carbon Cycle | Carbon Cycle, the series of natural processes by which carbon in the air is made available to living things, is used by them, and is then returned to the air. |
| Cybernetics | Cybernetics, the study and comparison of the way in which animals and machines control their movements and internal functions. |
| Family | Family, in biology, a group of living things believed to have a common ancestor. A family consists of one or more genera (singular: genus) made up of one or more species, or distinctive kinds, of living things. |
| Fermentation | Fermentation, a type of anaerobic respiration, an energy-releasing process that takes place in the absence of free (chemically uncombined) oxygen. |
| Kingdom | Kingdom, in natural science, one of several groups into which objects are classified. |
| Parasite | Parasite, an organism that lives in or on another organism, called the host, from which it obtains its food. |
| Symbiosis | Symbiosis, a close association between two different organisms. Symbiosis is a Greek word that means “living together.” In one type of symbiosis, known as mutualism, both partners benefit from the association. |
| Variety | Variety, in biology, a group of plants or animals within a species. Varieties of animals are usually called breeds. |
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