Kudzu is a vine from Southeast Asia that is able to grow one foot in length per
ID: 180017 • Letter: K
Question
Kudzu is a vine from Southeast Asia that is able to grow one foot in length per day, outcompeting neighboring plant species. One reason for this is kudzu’s flexible petioles, which orient its heart-shaped leaves to get the optimal amount of sunlight throughout the day. Based on this information, you can determine that kudzu has
Select one:
a. fibrous roots and scattered vascular bundles.
b. adventitious roots and scattered vascular bundles.
c. a taproot and scattered vascular bundles.
d. fibrous roots and vascular bundles arranged in a ring.
e. a taproot and vascular bundles arranged in a ring
Which statement about the role of gibberellins in germination is true?
Select one:
a. Actions by gibberellins bypasses the endosperm.
b. Gibberellins act through increased auxin concentrations.
c. Gibberellins inhibit germination.
d. Gibberellins cause the death of the aleurone layer.
e. Gibberellins promote the breakdown of stored molecules.
After setting the correct photoperiod, the managers of a greenhouse still do not have blooming roses. Which of the following events would most likely have contributed to the problem?
Select one:
a. The heating system allowed for fluctuations in temperature between 20°C and 25°C.
b. The furnace mechanic accidentally turned off the lights for an hour two days in a row.
c. The cleaning crew turned the lights on for an hour three nights in a row.
d. The staff forgot to fertilize the plants on their regular schedule.
e. The irrigation system failed over a weekend when no staff member was around.
Explanation / Answer
(1)e. a taproot and vascular bundles arranged in a ring
Kudzu will have deep taproots which help them to absorb the water better and also the vascular bindles are arranged in a ring.
(2)e. Gibberellins promote the breakdown of stored molecules.
Gibberellins promote germination and it helps the seed in breakdown of stored molecules thus will bring the see from dormancy. At the early stages of germination, we can see the breakdown of starch to release glucose to nourish the seedling. It will carry out this by triggering the synthesis of the enzyme -amylase in the aleurone cells.
(3)c. The cleaning crew turned the lights on for an hour three nights in a row.
By putting on lights during night time, the managers has interfered with rose blooming process.
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