Exam 38: Plant Signals and Responses to the Environment

What is the exposure of plants to low temperatures (in order to stimulate flowering) called?

Choose the type of plant chemical most closely associated with the action given below. Each chemical may be used more than once. -acting as antibiotic

Some signalling chemicals, such as oligosaccharins, are only synthesized when a tissue is damaged.

Plant cell walls grow faster in a neutral environment-that is, when the pH is close to 7.

Which type of plant hormone is primarily responsible for the bending of a plant shoot toward light?

According to the acid-growth hypothesis, auxin causes increased acidity in cell walls and disrupts bonds between cellulose microfibrils, allowing cell expansion. Which of the following does auxin activate for this to occur?

In systemic acquired resistance, the regulatory protein NPR-1 moves from the cytoplasm to the cell nucleus. What is this a consequence of?

Which type of plant signalling molecule is similar in structure to aspirin?

Explain the hypersensitive response.

What are statoliths (particles that move in the direction gravity pulls them) typically in plants?

Which type of plant hormone stimulates stomata to close during a drought?

What do we call plant responses to the relative lengths of light and dark periods in their environment during each 24-hour period?

Which of the following serves as a switching mechanism in the photoperiodic response in plants?

Choose the type of plant chemical most closely associated with the action given below. Each chemical may be used more than once. -operating in systemic acquired resistance

Which plant hormones are structurally similar to adenine?

Choose the type of plant chemical most closely associated with the action given below. Each chemical may be used more than once. -triggering synthesis of phytoalexins

What is required in tobacco tissue culture to get both roots and shoots to develop?

Which hormone's reduction in its amount causes a bush to become more bushy (have more lateral growth) after trimming a shrub?

Synthetic compounds similar to which plant hormones are used to prolong the shelf life of vegetables such as lettuces and mushrooms and to keep cut flowers fresh?

Which of the following triggers stomatal closure by involving the second messenger inositol triphosphate (IP₃)?