Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
21 Cards in this Set
- Front
- Back
|
What would happen if the secondary message cGMP was blocked in the de-etiolation pathway? |
Ca 2+ channels could open, and specific protein kinase 2 could still be produced |
|
|
The detector of light during de-etiolation of a tomato plant is |
phytochrome |
|
|
Plants growing in partially dark environments will grow towards the light in a response called phototropism. Which of the following statements is true regarding phototropism? |
Auxin causes a growth increase on one side of the stem |
|
|
Which of the following conclusions is supported by the research of both Went and Charles, and Francis Darwin on shoot reponses to light? |
A chemical substance involved in shoot bending is produced at the shoot tips |
|
|
Which of the following is a major mechanism whereby hormones control plant development? |
Cell division via the cell cycle |
|
|
Gravitropism in plant shoots and roots differ in that |
The threshold and response times is much less in shoots than in roots |
|
|
The ripening of fruit and the dropping of leaves and fruit are principally controlled by |
Ethylene |
|
|
Which plant hormones would likely be found in high amounts in sprouting vegetative stem? |
Auxins, gibberellins, cytokinins |
|
|
Which of the following plant hormones would be found in very low amounts in a mature, water-stressed tomato plant? |
Auxins, gibberellins, cytokinins |
|
|
When growing plants in culture, IAA is used to stimulate cell enlargement. Which plant growth regulator has to now be added to stimulate cell division |
Cytokinin |
|
|
Which of the following would never be found in high concentrations in a dormant overwintering flower bud? |
Ethylene |
|
|
IAA in plants are known to affect all of the following except... |
Maintenance of dormancy |
|
|
Plant hormones produce their effects by |
Altering the expression of genes and modifying the permeability of the plasma membrane |
|
|
If a farmer wanted more loosely packed clusters of grapes, he would most likely spray the immature bunches with... |
gibberellins |
|
|
Which of the following hormones would be logical first choice in an attempt to produce normal growth in mutant dwarf plants? |
gibberellin |
|
|
Both red and blue light are involved in |
stem elongation |
|
|
A flash of red followed by a flash of far-red light given during the middle of the night to a short-day plant will likely |
Have no effect upon flowering |
|
|
The aleurone layer if stimulated to release___ and ____ as result of giberrellins release from the embryo |
amylase, protease |
|
|
Which of the following plant hormones would most likely be found in high concentrations in a mature, slightly overripe fruit? |
Abscisic acid, and ethylene |
|
|
Which of the following plant hormones are most likely to act synergistically if expressed or applied |
Abscisic acid, and ethylene |
|
|
What is the probable role of salicylic acid in the defense responses of plants? |
to activate systemic acquired resistance of plants |
