Multiple Choice
The triple response to mechanical stress results in __________.
37. Plant Sensation and Response
Tropisms and Hormones
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Which of these features is/are characteristic of ethylene?
A
It is an organic compound.
B
It is active in small amounts.
C
Ethylene is involved in one of the rare examples of a positive feedback loop.
D
A burst of ethylene is almost always associated with apoptosis.
E
All of the listed responses are correct.
Verified step by step guidance1
Understand that ethylene is a simple hydrocarbon with the formula \( C_2H_4 \), making it an organic compound.
Recognize that ethylene acts as a plant hormone and is effective in very small concentrations, which is typical for hormones.
Identify that ethylene is involved in positive feedback loops, such as the ripening of fruit, where the production of ethylene stimulates further production.
Acknowledge that ethylene is associated with apoptosis, or programmed cell death, in plants, often as part of the senescence process.
Conclude that all the listed features are indeed characteristics of ethylene, confirming that the correct answer is that all responses are correct.
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