Plants: Essential Processes

Problem : Define a hormone and list the five different classes of plant hormones.

Problem : What is phototropism, and which hormone is responsible for it?

Problem : One of the plant hormones delays senescence (aging), and another stimulates it. Which hormone is responsible for each task?

Problem : Why is the balance between auxins and cytokinins important to the plant?

Problem : Explain the acid growth hypothesis. What phenomenon in plants does this hypothesis account for?