Chapter 7: Plants

3. The sepal is a leaf-shaped structure found in flowering plants.
4. Any material that organisms are made up of.
7. Mass of scales or bracts,usually ovate in shape.
11. Petals are modified leaves that surround the reproductive parts of flowers.
12. Plant structure that develops into a seed when fertilized.
14. Any member of a class of signaling molecules in multicellular organisms.
15. Once a year.
18. The response or orientation of a plant or certain lower animals to a stimulus that acts with greater intensity from one direction than another.
20. A plant that only lasts one year.

1. The ovule producing part of a flower.
2. A membrane-bound cell organelle.
5. A mass of micro-spores in a seed plant appearing usually as a fine dust.
6. Fertilized egg cell.
8. The male reproductive part of a flower.
9. One of two groups that flowering plants can be sorted into.
10. Hormones that control growth.
11. Fuel from the decomposition of organic matter.
13. A fruit is a mature, ripened ovary, along with the contents of the ovary.
16. A seed is a small embryonic plant enclosed in a covering called the seed coat, usually with some stored food.
17. A plant with two growing seasons.
19. Enlarged basal portion of the pistil.