Ecoology part 2

4. tissue of plants includes all tissues that are neither dermal nor vascula
7. an animal embryo at the early stage of development when it is a hollow ball of cells.
9. tissue of plants includes all tissues that are neither dermal nor vascula
10. when did primitive land plants
13. the state of being temporarily inactive or inoperative
15. the branch of biology that deals with the relations of organisms to one another and to their physical surroundings
17. the turning of all or part of an organism in a particular direction in response to an external stimulus.
18. is the vascular tissue in plants that conducts water and dissolved nutrients upward from the root and also helps to form the woody element in the stem
19. another term for kinin

1. a type of water-conducting cell in the xylem which lacks perforations in the cell wall.
2. the middle layer of an embryo in early development, between the endoderm and ectoderm.
3. which is a characteristic of mosses
5. a diploid cell resulting from the fusion of two haploid gametes; a fertilized ovum.
6. any of a group of plant hormones that stimulate stem elongation, germination, and flowering.
8. a plant hormone which causes the elongation of cells in shoots and is involved in regulating plant growth.
11. The outer covering of the seed
12. an embryo at the stage following the blastula, when it is a hollow cup-shaped structure having three layers of cells.
14. an outer layer of tissue immediately below the epidermis of a stem or root.
15. a major plant hormone
16. the stalk that joins a leaf to a stem; leafstalk.