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8.3 Science Vocab.
| Term | Definition |
|---|---|
| phloem | vascular tissue through which food moves. |
| xylem | water and minerals travel in this vascular tissue. |
| pollen | tiny structures that contain the cells that will later become sperm cells. |
| seed | structure that contains a young plant inside a protective covering. |
| embryo | the young plant that develops from the zygote (fertilized egg.) |
| cotyledons | in all seeds, the embryo has one or more of these seed leaves. |
| germination | occurs when the embryo begins to grow again and pushes out of the seed. (begins when the seed absorbs water from the environment.) |
| root cap | protects the root form injury from rocks as the root grows through the soil. |
| cambium | layer of cells which divide to produce new phloem and xylem. |
| transpiration | the process by which water evaporates from a plant's leaves. |