Chemical Control Tools A B Chemical Control coordinates body processes by transmitting messages from one part of the organism to another,• Unlike nerve control, chemical control is achieved through hormonal action in both plants and animals Plant hormones chemicals that affect growth and development Auxins 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 synthesize and secrete hormones which control the activities of animals Hormones chemicals secreted in one area of the body which affect responses in other areas circulatory system aids in the distribution of these hormones Metamorphosis • The development in an animal larva that transforms into a sexually mature adult