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Unit 37 - IB Biology - 9.3 Plant Growth Flashcards | StudBud
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Unit 37 - IB Biology - 9.3 Plant Growth
Unit 37 - IB Biology - 9.3 Plant Growth
19 terms
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IB Biology #ibbiology #plants #meristems #auxins
Flashcards
19 cards
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Practice quiz
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Questions
19
Answers
1
Which of these are natural clones?
Micropropagation of orchid species
Growing new apple trees by rooting of stem cutting
Strawberry plants forming off a runner stem
Bulking of plant varieties for agriculture
2
Which of the following best describes the mechanism of apical dominance?
Growth at nodes is inhibited by auxin from apical meristem
The shoot receives the most sunlight & nutrients
Pruning causes growth of the auxiliary buds
Roots grow only after the apical meristems develops
3
What causes root gravitropism?
Inhibition of cytokinin
Auxin stimulating growth of the bottom side of a root
Auxin stimulating growth of the top side of a root
Elongation of cells on the bottom side of a root.
4
Potatoes are a plant _____.
Root
Runner
Leaf
Stem
5
The rapidly dividing cells found at the tips of the stem are called
Apical meristems
Apical auxins
Axillary buds
Lateral meristems
6
What is the role of phototropins?
trigger redistribution of auxin to the dark side of the plant
trigger redistribution of auxin to the light side of the plant
Activate gravitropism response
Produce meristems for phototropism
7
What is a positive outcome of micropropagation?
More potatoes means more French fries!
Creating plants with virus strains
Extinction of rare plant species
Increased number of commercial plants
8
During micropropagation, what will form if the media contains more auxin than cytokinin?
cork
shoots
roots
leaves
9
Which meristems cause development of woody stems with bark?
Lateral meristems
Apical meristems
10
Which of the following is
not
true of auxin?
Promotes growth at the apical shoot
Promotes growth at the auxillary buds
High concentrations promote cell elongation in shoots
High concentrations will inhibit growth in roots
11
Which type of meristems occurs between xylem and phloem in the plant stem?
shoot
peripheral
Lateral
Apical
12
How do viruses travel through plants?
Through root hairs
Through axillary bud nodes
Through meristematic tissues
Through vascular tissues
13
Which of the following is true of PIN molecules?
Integral proteins that import auxin into the cell.
Integral lipids that export auxin out of a cell.
Integral proteins that export auxin out of a cell.
Peripheral proteins that export auxin into of a cell.
14
Which of the following is not true when meristematic cells divide?
One of the new cells will differentiate
One of the new cells will remain meristematic
The new cells are genetically identical
The new cells enter G0
15
How is phototropism controlled?
Auxin moves to dark side and inhibits cell elongation.
Auxin moves to dark side and triggers cell elongation.
Auxin moves to light side and inhibits cell elongation.
Auxin moves to light side and triggers cell elongation.
16
How do microarrays indicate gene expression is taking place?
They blink
They change color
They fluoresce
They disappear
17
What promotes the growth of auxiliary buds?
Pruning
Rate of mitosis in apical meristems
Production of PIN3 proteins for auxin transport
Cell elongation in lateral meristems
18
Which meristems is responsible for primary growth?
Apical meristems
Lateral meristems
19
Micropropagation is a form of
Genetic modification
Asexual reproduction
Sexual reproduction
Somatic cell nuclear transfer
