What are four ways to block ethylene action?
What will be an ideal response?
• Treating flowers with silver thiosulphate (trade name Floralife) blocks the ethylene
receptor, thereby stopping ethylene's capability to function as a plant hormone.
• Placing horticultural commodities in hypobaric storage keeps the commodity under
vacuum and thereby does not enable ethylene to stay in contact with the commodity,
which in turn stops ethylene's capability to act.
• Treating horticultural commodities with levels of CO2 greater than 2 percent
reduces the capability of the ethylene receptor to accept ethylene, which in turn
blocks ethylene action.
• Genetically engineering plants that have a modified ethylene receptor that does not
accept ethylene blocks ethylene's action.
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Indicate whether the statement is true or false
Which of these statements concerning the SAE flare fittings used on hydraulic brake systems is TRUE?
A) Have a 45-degree taper on the male part of the fitting B) Have a 20-degree taper on the male and female parts of the fitting C) Have no taper on the female part of the fitting D) Must be single flared
A combination of two elements makes up common fuel gases. Which of the following elements make up these fuel gases?
A) Hydrogen and carbon B) Carbon and fluoride C) Carbon and oxygen D) Hydrogen and oxygen
What advantages do orifice type metering devices have over capillary tubes?
A) They equalize during the off cycle. B) They are easy to change. C) They adjust to changing operating conditions. D) They are more efficient.