Choose the One Most Appropriate Answer for Each

question 11

Multiple Choice

Choose the one most appropriate answer for each. Each letter will be used once.
-auxin

• A)growth response that orients parts of a plant in a direction influenced by light
• B)burst of hydrogen peroxide and nitric oxide that causes infected cells to commit suicide
• C)an organism's response to changes in length of day relative to night
• D)organelle involved in sensing gravity
• E)light-sensitive pigment that helps set plant circadian rhythm based on length of night
• F)flowering after a long season of cold temperatures
• G)closes stomata in times of stress
• H)initiates fruit ripening in nearby fruits
• I)flowers only when hours of darkness fall below a critical value
• J)flavonoid in cocoa responsible for the unusual absence of heart disease in the Kuna
• K)occurring on a 24-hour cycle
• L)flowers only when hours of darkness are greater than some critical value
• M)activates systemic acquired resistance
• N)inhibits the growth of lateral roots
• O)mobilizes food reserves in germinating seeds

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Definitions:

Suberin

A waxy hydrophobic substance found in the cell walls of plants, acting as a barrier to water and solute movement.

Lignin

A complex organic polymer found in the cell walls of many plants, making them rigid and woody, and contributing to their structural support.

Meristem

A region in plants where cell division occurs, leading to growth and development.

Plasmodesmata

In plants, cytoplasmic connections in the cell wall that connect two adjacent cells.