List five ways to eliminate viruses from established clones.
What will be an ideal response?
Thermotherapy; shoot apex culture; micrografting; grow seedlings; propagate from unaffected plants
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Gasoline can be refined so it will not knock as easily. This fuel has a high ____ value.
A. dieseling B. LPG C. ethanol D. octane
Briefly discuss what factors are considered in the design of an at-grade railway crossing in addition to those for an at-grade crossing formed by two highways.
What will be an ideal response?
Why should a steam humidifier be filled with water before it is energized?
What will be an ideal response?
Technician A says that the same recovery unit can be used for R-12 and R-134a. Technician B says that the service hoses from an R -134a recovery unit must have shutoff valves within 18 inches of the end. Who is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B