What is one of the most effective mulch materials for the garden that increases crop yields?
A) Black plastic mulch
B) Tree bark mulch
C) Hairy vetch
D) Leaves
C
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What energy source does the plant utilize for photosynthesis?
a. wind c. gravity b. water d. sun
Identify each of the following costs associated with owning an automobile as direct (D) or indirect (I). Assume a direct cost is one that is directly attributable to the number of miles driven. (a) License plate, (b) Drivers license, (c) Gasoline, (d) Highway toll fee, (e) Oil change, ( f ) Repairs after collision, (g) Gasoline tax, (h) Monthly loan payment, (i) Annual inspection fee, and ( j ) Garage rental.
What will be an ideal response?
Technician A says that a radio can receive AM signals, but not FM signals, if the antenna is defective
Technician B says that a good antenna should give a reading of about 500 ohms when tested with an ohmmeter between the center antenna wire and ground. Who is right? A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
An ecosystem is self-sustained
Indicate whether the statement is true or false