| A | B |
|---|
| bacteria | simple one-celled organisms |
| flowers | in a plant, the reproductive organ that produces seeds and pollen |
| influenza | (flu) an illness caused by a virus |
| pneumonia | an infection of the lungs caused by viruses or bacteria |
| root | the part of a plant that holds it in the ground and absorbs water and nutrients from the soil |
| stem | the part of a plant that provides support and transports substances |
| leaf | the part of a plant that produces food from water, carbon dioxide, and sunlight |
| bud | on a plant, areas of growth that develop into leaves and flowers |
| bark | the woody outer part of a plant stem |
| virus | a tiny particle of genetic material with a protein covering |
