| A | B |
|---|
| antibiotic | a substance produced by certain fungi,bacteria or other organisms.This substance stops the growth of harmful bacteria that can cause illness. |
| biopsy | the removal of tissue from a living person for examination or study |
| biosphere | the part of earth and its atmosphere in which living things exist |
| devitalize | to lower or destroy the physical energy or vigor of someone or something |
| microbe | a tiny life form that can be seen only through a microscope;a germ |
| symbiosis | a close,beneficial relationship between two or more organisms.These organisms often,but not always,benefit each other. |
| viable | capable of continuing to live,grow or develop under favorable conditions;capable of working successfully or effectively |
| vitality | physical or mental energy;vigor;the quality that distinguishes the living from the non-living |
| vivacious | full of spirit;lively |
| vivid | bright,distinct and intense;creating lifelike images within the mind |
