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Use the following information when answering the corresponding questions).
The shade avoidance response is a plant's way of changing its growth pattern when it is being shaded by another plant. Upon to shade, many plants will grow taller, flatten their leaf angle, and extend their leaves further from their stems in order to reac sunlight. Research performed by Pierik et al. Interactions between ethylene and gibberellins in phytochrome- mediated shade avoidance responses in tobacco. 2004. Plant Physiology 136:2928- 36; online at "http://www.plantphysiol.org/cgi/content/full/136/2/2928)" http://www.plantphysiol.org/cgi/content/full/136/2/2928) examined the role of ethylene and gibberellins on the shade avoidance response in tobacco plants. The shade avoidance response is known to involve phytochromes.
-Ethylene's role in the shade avoidance response in tobacco plants is related to its role in fruit ripening, leaf abscission, and senescence.
Painful Stimulus
An external or internal event or trigger that can cause a physical or emotional experience of pain.
Intonations
The variation of pitch in speech that affects the meaning of words, conveying emotions and grammatical signals.
Fetal Period
The stage of human development that begins around the end of the eighth week after conception and continues until birth.
Embryo
An early developmental stage in many multicellular organisms, following fertilization and preceding fetal development in humans.
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