Which hormone(s) is/are responsible for the ability of sunflowers to turn their flowers to track the sun throughout the day? Explain how these hormones work.

Which plant hormone is transported from cell to cell in a polar fashion? What is the mechanism underlying this polar transport?

List several ways that each of these hormones affects plant growth and development: auxins, gibberellins, cytokinins, ethylene, abscisic acid, and brassinosteroids.

A shrub growing in the forest has recently had its shoot apical meristem eaten by a deer. Using your knowledge of plant hormones, how and why will this affect the remaining buds on the shrub shoot and the future growth of the plant aboveground and belowground.

The summer is not optimal for grape growing and you're searching in your memory for something regarding plant hormones.  Explain 2 ways you could utilize plant hormones (choose from auxin, ethylene, cytokinin, gibberellin, abscisic acid, salicylic acid, jasonic acid) to compensate for a problem during growing.  For each way:

Match the observation with the main hormones.. ___ ethylene a. Your cabbage plants bolt they form elongated flowering stalks. ___ cytokinin b. The potted plant in your room is leaning toward the window ___ auxin c. Lateral buds are sprouting. ___ gibberellin d. The seeds of your roommates marijuana plant do not germinate no matter what he does to them. ___ abscisic acid e. The last of your apples is getting really mushy ___ nitric oxide f. Your lettuce plants develop brown spots on their leaves.

Greenhouse-grown tomato seedlings are often brushed by hand to simulate wind. This causes seedlings to grow slower, thicken stems, & resist mechanical wind damage when planted in the field.  Which hormone is responsible?      Auxin     Salicylic acid     Gibberellin     Abscisic acid     cytokinin     Ethylene

Which of the following is not a characteristic of plant hormones? They are active in small concentrations They are synthesized in specific glands and tissues They are pleiotropic in their effects Plant hormones are tissue and time-specific

Match the effect/process with the hormone responsible or effected                                                                                                         when plants encounter an object and slow their growth, thicken the organ (root or stem), and grow around the object                                                                                                         this hormone is activated in response to attack by biotrophic pathogens                                                                                                         stimulates germination                                                                                                         loss of function of this hormone results in early germination before seeds are mature                                                                                                         the hormone that is responsible for stimulating cell division…

Match each hormone to its function or application. NOTE: If none of the options are correct, you MUST select #4for 'none of the above', otherwise it will be graded as incorrect   Question 14 options:   Auxin   Giberellins   Cytokinins   Ethylene   1. Used in anti-aging skin creams. 2. Ripens fruit. 3. Causes stems to bend towards the light. 4. None of the above