What is the main problem with using broad-spectrum pesticides?
A. They kill crop-eating and beneficial insects.
B. They are too diluted to kill anything.
C. They kill everything including humans.
D. They promote the growth of beneficial insects which upsets the natural balance.
Answer: A
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Power is the
A. Amount of work done when a force of one newton is exerted over one meter B. Rate of energy delivery (work done per second) C. Amount of energy available D. Capacity to do work (force over distance) E. Combination of the rate of energy delivery, amount of energy available, and the capacity to do work
Japan is bordered on the southeast by a back-arc basin. Indicate whether the statement is true or false
The sound of thunder caused by a lightning strike reaches your ears ________ the light from the lightning flash reaches your eyes
A) before B) at the same time as C) after
Which of the following is most soluble in water?
A) butanal B) heptanal C) hexanal D) pentanal