| Term | Definition |
| seed | a plant part that contains a beginning plant and stored food |
| fern | a seedless vascular plant |
| moss | a nonvascular plant that has simple parts |
| vascular plant | a plant that has tubelike cells |
| nonvascular plant | a plant that does not have tubelike cells |
| vascular tissue | a group of plant cells that form tubes through which food and water move |
| embryo | a beginning plant |
| angiosperm | a flowering plant |
| monocot | an angiosperm that has one seed leaf |
| dicot | an angiosperm that has two seed leaves |
| cotyledon | a structure in the seeds of angiosperms that contains food for the plant |
| gymnosperm | a nonflowering seed plant |
| conifer | a cone-bearing gymnosperm |
| frond | a large feathery leaf of a fern |
| sori | clusters of reproductive cells on the underside of a frond |
| spore | the reproductive cell of some organisms |
| rhizome | a plant part that has shoots above ground and roots below ground |
| rhioid | a tiny rootlike thread of a moss plant |
| humus | decayed plant and animal matter that is part of the topsoil |