Ecology II

1. Clusters of sporangia form this.
2. A plant structure that contains an embryo,contains nutrients for the embryo, and is covered with a protective coat.
9. Plants that lack specialized transport tissues.
12. A structure that contains the male or female reproductive structures of cycads and other gymnosperm plants.
15. A food-storage organ.
16. A plant that lives anchored to an object or another plant.
17. Specialized transport tissue.
19. Plants with vascular tissue.
20. Regions of rapidly dividing cells.

1. Plant cells that lack cytoplasm and other living components when they mature, but their thick rigid cell walls remain.
3. A compact cluster of spore-bearing structures.
4. Produces cells that develop tough cell walls.
5. The structure fern spores form in.
6. When the plant has a life span of two years.
7. Are plant cells that often are elongated and occur in long strands or cylinders that provide support for the surrounding cells.
8. Most flexible, thin-walled cells found throughout a plant.
10. Openings in the outer call layer of leaves and some stems.
11. A plant that can live for several years.
13. sprouts from a seed,grows,produces new seeds, dies.
14. Structures that either store food or help absorb food for the tiny sporophyte.
18. A thin cylinder of meristematic tissue that can run the entire length of roots and stems