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Across 2. Only plants in which the gametophyte phase is dominant. 4. A fertilized egg. 6. A plants response to gravity. 7. The movement of a plant in response to an environmental stimulus. 8. A spore-producing plant. 9. Plant hormones that stimulate cytokinesis. 12. The tip of a moss sporophyte. 13. A type of asexua reproduction in which stems, leaves, or roots attached to a parent plant produce new individuals. 16. The process in which one sperm fertilizes an egg and the other forms a triploid cell. 17. The state where an embryo has stopped growing. 19. Plant hormones that are involved in the lengthening of plant cells produced in teh apical meristem. 20. A plant hormone that causes ripening and is naturally produced by fruits. 21. Stems that grow horizontally along the ground. 25. A tube that leads from the stigma to the ovary. 26. Plants that can grow a new individual froma fragment of a stem, leaf, or root. 27. Modified leaves that protect the developing flower. 28. The gamete-poducing plant. 29. Made up of a stalk and anther. 32. Plant hormones that produce dramatic increases in size. 33. The place wehre female gametophytes are formed. 34. Underground stems surrounded by modified leaves. 35. The name for fern leaves. 36. Part of the flower that is covered with a sticky substance that holds pollen grain.

Down 1. A chemical messenger produced in one part of an organism that stimulates or suppresses the activity of cells in another part. 3. The type of life cycle which alternates between diploi and haploid phases. 5. The ability of plants to measure the amount of sunlight. 10. A response to touch. 11. This process begins when an embryo first takes up water. 14. Horizontal underground stems. 15. The female structure of the plant. 18. Food supply for the developing plant embryo. 22. The name given to a plant once a plant starts photosynthesis. 23. Seed leaves. 24. The name given for a the fern gametophyte. 30. An underground stem modified for storage. 31. The bright modidfied leaves that attract pollinators.