Where on the chromosomes are satellites found?
A) at center and the 5' end
B) only at the ends
C) only at the center
D) at both the center and the ends
D
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Manganese nodules ____
A) are a type of cosmogenous sediment B) are almost exclusively found on continental shelves C) "grow" very slowly, at an average rate of 1 to 10 millimeters per million years D) are inexpensive to collect and are, therefore, widely exploited
What marine resource has been rendered uneconomical due to the cost of excavation?
A) Magnesium compounds B) Manganese nodules C) Sand and gravel D) Salt
Leaching ________
A) is caused by upwelling of groundwater into soils B) is a natural mechanism for adding nutrients to soils C) removes water-soluble nutrients from soils D) helps crops grow when it occurs in spring E) is a natural component of composting
In terms of agriculture, pesticides have led to ________ for consumers.
A. Lower monetary costs B. Better produce quality C. More availability of produce D. More attractive produce E. All of these are correct