Reproduction in Plants

4. This describes the outer covering of fruits that contains air spaces.
5. Other than water, plants compete to take in this from the soil.
7. Other than stiff spikes, these allows a seed to attach itself to the fur of an animal.
11. Seeds are dispersed to reduce the chances of this occurrence.
13. They wither and drop off during fruit formation.
14. This abiotic factor helps in pollination and fertilisation.
15. It attracts animals to move into the flower.
17. The male cell which moves down the style carries genetic material in this part.
19. What the ovary develops into.
20. Flowers pollinated by them are large, brightly-coloured and scented.

1. This describes a fruit that attracts animals to eat it.
2. The process where the male and female reproductive cells fuse.
3. It supports the anther.
6. Having this allows a plant to spread out its leaves to trap more light.
8. What a seed develops from.
9. This is the transfer of pollen grains from the anther to stigma.
10. This structure helps seeds to stay afloat in air longer.
12. Other than being large, the stigma of wind-pollinated plants may be this.
16. Seeds which are light with fine hairs are easily lifted by these currents.
18. Seeds dispersed in this way have pod-like structures that harden when ripe.