A permeable rock mass must be porous (or fractured), but a porous rock mass may not necessarily be
permeable. Indicate whether the statement is true or false.
T
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Of the following choices, which kills the most crop-eating insects each year?
A. spiders B. pesticides C. insecticides D. grasshoppers
About how large can raindrops get? Why can't they get any larger? What shape does a large raindrop have? What forces determine this shape?
What will be an ideal response?
What are some examples of barriers to dispersal of organisms? What are examples of factors that would act as filters to only certain species? Why do you think this study looked at only nonflying mammals?
Subduction produces mountains because subduction zones are the upwelling zones of mantle convection, which lifts the earth's surface to form mountains
Indicate whether the statement is true or false