Across
- 3. A modified leaf that bears sporangia and hence is specialized for reproduction. (10)
- 5. these plants flower when nights are shorter than a critical length (4, 3)
- 9. Fusing of a pollen nucleus with the haploid ovule egg cell. (13)
- 11. A group of undifferentiated plant cells that can give rise to the four organs making up a flower due to the expression of various genes. (6, 8)
- 14. Biotic or abiotic agents, such as wind and bees, that move pollen from an anther to a stigma, or disperse seeds from parent plant. (6)
- 17. A "seed leaf" which develops as a part of the seed. It provides nutrients to the developing seedling and may become the first leaf of the plant. (9)
Down
- 1. plants that flower when nights are longer than a critical length (5, 3)
- 2. The photoreceptor responsible for keeping track of the length of day and night; there are two forms of this, Pr (red light absorbing) and Pfr (infrared light absorbing) (11)
- 4. Transfer of pollen from the anther to the stigma of a flower. (11)
- 6. The movement or transport of seeds away from the parent plant, facilitated by the fruit. (9)
- 7. A mature ovary of a flower that protects dormant seeds and aids in their dispersal. (5)
- 8. The part of a plant embryo that gives rise to the shoot. (7)
- 10. The part of a plant embryo that develops into the primary root (7)
- 12. An association between organisms of two different species in which each member benefits. (11)
- 13. Tough covering that surrounds and protects the plant embryo and keeps the contents of the seed from drying out - also called seed coat(5)
- 15. Tiny hole in the seed coat where water enters the seed to trigger germination (9)
- 16. A physiological response to photoperiod, the relative lengths of night and day. An example of photoperiodism is flowering. (14)