| A | B |
| Chemical Control | Similar to nerve control, chemical control coordinates body processes by transmitting messages from one part of the organism to another |
| Characteristics of Plant Hormones | Plant hormones are chemicals that affect growth and development |
| Role of Plant Hormones | Auxins are one type of plant hormone |
| Phototropism | Growth of a plant towards light due to unequal distribution of auxins |
| Geotropism | Growth of a plant due to gravity |
| Chemical Control in Animals | Chemical control in animals differs from that in plants since animals possess cells specialized solely for hormone production |
| Endocrine Glands | Endocrine glands synthesize and secrete hormones which control the activities of animals |
| Role of Animal Hormones | 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 |
| Metamorphosis | The development in an animal larva that transforms into a sexually mature adult |