Tree growth in the taiga is limited by
A. Intense heat and dryness
B. The increased soil salt content from ocean tides
C. Competition from fast-growing grasses
D. The lack of large predators
E. Extreme cold and short summers
Answer: E
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The continental crust has an average age of ________ and a maximum age of ________
A) 1.2 billion; 3.9 billion B) 1.6 billion; 4.0 billion C) 1.8 billion; 3.2 billion D) 2.2 billion; 4.4 billion
Which of the following best matches the description?Plant hormone that stimulates growth.
A. micronutrient B. hard pesticide C. fungicide D. herbicide E. rodenticide F. pheromone G. persistent pesticide H. biomagnification I. soft pesticide J. organophosphate K. biocide L. auxin M. micronutrients N. weed O. macronutrients P. chlorinated hydrocarbon Q. macronutrient
Which of the following factors does not favor motion and slope instability?
A) increasing slope B) smoother surfaces C) the presence of water D) the presence of vegetation
Bacteria are a valuable source of protein for other marine organisms.
Answer the following statement true (T) or false (F)