Plants

4. in flowering plants, the lower part of a pistil that produces eggs in ovules
5. one of many openings in a leaf or a stem of a plant that enables gas exchange to occur
8. a woody, vascular seed plant whose seeds are not enclosed by an ovary or fruit
11. in a flower, one of the outermost rings of modified leaves that protect the flower bud
12. carbohydrate that adds rigidity to the cell walls in plants and some fungi
13. one of the usually brightly colored, leaf-shaped parts that make up one of the rings of a flower
14. the type of tissue in vascular plants that provides support and conducts water and nutrients from the roots
16. sticky surface at the tip of the style to receive pollen from wind or insects

1. one of a pair of specialized cells that border a stoma and regulate gas exchange
2. a structure in the ovary of a seed plant that contains an embryo sac and that develops into a seed after fertilization
3. the male reproductive structure of a flower that produces pollen and consists of an anther at the tip of a filament
6. a flowering plant that produces seeds within a fruit
7. a plant that produces seeds that have only one cotyledon
9. the female reproductive part of a flower that produces seeds and consists of an ovary, style, and stigma
10. the tissue that conducts food in vascular plants
15. angiosperm that has two cotyledons, net venation, and flower parts in groups of four or five
16. in plants, the slender, upper part of the pistil