Activity 2

3. the part of a plant which attaches it to the ground or to a support, typically underground, conveying water and nourishment to the rest of the plant via numerous branches and fibres.
6. prevent
8. permanent increase in the surface of the cell wall.
11. the growth of the parts of plants in response to the force of gravity. The upward growth of plant shoots is an instance of negative geotropism ; the downward growth of roots is positive geotropism.
12. the development of a plant from a seed or spore after a period of dormancy.

1. the growth or turning of plant roots towards or away from moisture.
2. a plant hormone which causes the elongation of cells in shoots and is involved in regulating plant growth.
4. any of a group of plant hormones that stimulate stem elongation, germination, and flowering.
5. a flammable colorless gaseous alkene
7. the orientation of a plant or other organism in response to light, either towards the source of light or away from it
9. consist of stems including their appendages
10. Hormones are your body's chemical messengers