| A | B |
|---|
| predator | An organism that preys on and consumes animals; usually an animal. |
| prey | An organism caught or hunted for food by another organism. |
| producer | An organism that makes its own food from the environment; usually a green plant. |
| protists | unicellular organisms |
| recessive trait | Opposite of dominant. A trait that is preferentially masked/hidden; being concealed. |
| reclamation | The conversion of wasteland into land suitable for use of habitation or cultivation. |
| respiratory system | The system of organs and structures in which gas exchange takes place, consisting of the lungs and airways in air-breathing vertebrates, gills in fish and many invertebrates, the outer covering of the body in worms, and specialized air ducts in insects. |
| skeletal | Of or relating to or forming or attached to a skeleton, the internal structure of vertebrate animals composed of bone and cartilage. |
| solid | Having a definite shape and a definite volume; one of the fundamental states of matter. |
| solubility | The ability or tendency of one substance to dissolve in another at a given temperature and pressure. |
| solution | The way people agree to solve a problem. The solution to the leaky pipe is to replace it. |
| states of matter | One of the three forms that matter can take; solid, liquid or gas. |
| succession | Predictable and orderly changes in the composition or structure of an ecological community. |
| suspension | Mixtures in which suspended particles can easily be seen. |
| symbiosis | The intimate living together of two dissimilar organisms, frequently (but not always) in a mutually beneficial relationship. |
| tissue | Similar cells acting to perform a specific function; four basic types of tissue are muscle, connective, nerve, and epidermal. |
| transpiration | The release of moisture through the leaves of a plant; the process by which water absorbed by plants, usually through the roots, is evaporated into the atmosphere from the plant surface, principally from the leaves. |
| volume | A measure of the amount of space an object takes up; also the loudness of a sound or signal. |
