Ecology II

2. Openings in the outer call layer of leaves and some stems.
7. Plants with vascular tissue.
9. The structure fern spores form in.
11. A compact cluster of spore-bearing structures.
13. sprouts from a seed,grows,produces new seeds, dies.
15. Structures that either store food or help absorb food for the tiny sporophyte.
17. Plant cells that lack cytoplasm and other living components when they mature, but their thick rigid cell walls remain.

1. Are plant cells that often are elongated and occur in long strands or cylinders that provide support for the surrounding cells.
3. When the plant has a life span of two years.
4. Most flexible, thin-walled cells found throughout a plant.
5. A plant that can live for several years.
6. Specialized transport tissue.
8. A plant that lives anchored to an object or another plant.
10. Clusters of sporangia form this.
12. A food-storage organ.
14. Plants that lack specialized transport tissues.
16. A plant structure that contains an embryo,contains nutrients for the embryo, and is covered with a protective coat.
18. A structure that contains the male or female reproductive structures of cycads and other gymnosperm plants.