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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. |
| Amino Acid | Amino Acids, chemical compounds produced by living organisms. Many amino acids are the structural units of proteins. |
| Evolution | Evolution, as defined in biology, the continual process by which one form of life changes, or evolves, into another form. |
| 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. |
| 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. |
| Fermentation | Fermentation, a type of anaerobic respiration, an energy-releasing process that takes place in the absence of free (chemically uncombined) oxygen. |
| Variety | Variety, in biology, a group of plants or animals within a species. Varieties of animals are usually called breeds. |
| Adaptation | Adaptation, in biology, the process by which a living thing becomes better suited to its environment. |
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