| A | B |
|---|
| Chemical Control | chemical control is achieved through hormonal action in both plants and animals |
| Plant hormones | are chemicals that affect growth and development |
| tropism, and reproduction | These hormones function in the coordination of growth |
| There are no plant organs specialized exclusively for | hormone production |
| Plant hormone | production is most abundant in the tips of roots and stems, buds and seeds |
| Auxins | are one type of plant hormone |
| tropisms | Unequal distribution of auxins causes unequal growth responses called |
| Unequal auxin distribution can be caused by external stimuli | such as light and gravity |
| Phototropism | Growth of a plant towards light due to unequal distribution of auxins |
| Geotropism | Growth of a plant due to gravity |
| hormone production | Chemical control in animals differs from that in plants since animals possess cells specialized solely for |
| Endocrine glands | synthesize and secrete hormones which control the activities of animals |
| Hormones | are chemicals secreted in one area of the body which affect responses in other areas |
| Hormones interact and exert control on metabolic activities such as | metamorphosis and reproduction |
| Metamorphosis | The development in an animal larva that transforms into a sexually mature adult |
