What are the two characteristics of media for growing plants?
What will be an ideal response?
Media should have ability to drain well and ability to retain water and nutrients for plant's use.
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_____ are only found in North America
a. Pronghorn antelope b. White-tailed deer c. Buffalo d. Black bear
The term _____ refers to characteristics about audience members which are hard to change, such as gender, age, income, education level, and place of residence
Fill in the blank(s) with correct word
Symbols make it possible to develop mathematical formulas and equations.
Answer the following statement true (T) or false (F)
How does the flame rod sense the flames in a flame rectification circuit?
A) The flame rod expands from being heated, making a mechanical switch at its base B) The flame rod is made of a semiconductor material that acts as a silicon controlled rectifier when it is hot C) The resistance of the flame rod changes when heated by the flame D) The flame changes the AC voltage to pulsed DC current