Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Question
Describe in your own words, how the experiments featured demonstrate the role of the plant hormone of interest.
Transcribed Image Text:The Thompson seedless
grape bunch on the left is
from an untreated control
vine. The bunch on the right|
is growing from a vine that
was sprayed with gibberellin
during fruit development
Gibberellins: Regulators from
Spraying with
gibberellins causes cabbage and
some other plants to bolt
Germination to Fruit Growth
> There are dozens of gibberellins.
One, gibberellin A1, regulates stem
growth in most plants.
> Mutant plants that cannot
produce normal amounts of
gibberellins are dwarfs: Their stems
are shorter than wild-type stems.
→ Gibberellins regulate the growth
of some fruits and cause bolting in
some biennial plants.
The internodes of plants treated with
gibberelin elongate dramatically.
resulting in towering shoots
Untreated control
plants retain their
compact, lealy heads.
Without gibberellin
With gibberellin
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