Plants

4. female reproductive structure of a seed plane where the haploid egg develops
6. process during which a nucleus and its contents divide
9. immature diploid plant that develops from the zygote
14. occurs when the life cycle of an organism alternates between diploid and haploid cells
16. any change in the environment that causes organisms to respond
17. usable power
18. forms from an ovary and sometimes other parts of the flower and contains one of more seeds
19. series of chemical reactions that convert light energy, water, and carbon dioxide into glucose and give off oxygen

1. series of chemical reactions that convert the energy in food molecules into ATP
2. haploid generation of a plant; a daughter cell produced from a haploid structure
3. substance that acts as a chemical messenger within plants
5. female reproductive organ of a flower
7. structure made up of an embryo, its food supply, and a protective covering
8. haploid and diploid stages in the life cycle of a plant
10. structure found at the base of the style that contains one of more ovules
11. plants response to the number of hours of darkness in its environment
12. response that results in plant growth toward or away from a stimulus
13. structure that forms from fissure in the male reproductive structure of a seed plant and produces sperm cells
15. male reproductive organ of a flower