Which of the following best matches the description?Boron, zinc, and manganese.
A. macronutrients
B. soft pesticide
C. weed
D. fungicide
E. chlorinated hydrocarbon
F. micronutrient
G. auxin
H. rodenticide
I. biomagnification
J. hard pesticide
K. persistent pesticide
L. pheromone
M. organophosphate
N. biocide
O. micronutrients
P. macronutrient
Q. herbicide
Answer: O
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Scientific theories are
a. frequently overturned and changed because they are, in fact, just theories. b. overturned on a regular basis at periodic scheduled meetings of the scientific community to evaluate the validity of all scientific theories. c. never overturned. d. rarely overturned unless new evidence discredits them. e. overturned only as a result of Supreme Court decisions.
If you were designing a rock that would be easily weathered, which of the following characteristics would it have?
A. a soluble chemical composition B. closely spaced fractures C. a rock composed of abundant pieces D. a limestone in a wet climate E. All of these choices are correct.
The North Star is called ____________________
Fill in the blank(s) with correct word
Several recent earthquakes in Washington's Puget Sound region were caused by movement of the subducting ________ Plate.
A. North American B. Nazca C. Juan de Fuca D. Pacific E. Cocos