Give an example of two ways humans have made major modifications to the Mississippi River system
What will be an ideal response?
Answer: This answer could go several ways. Dams and levees are most likely. These regulate the flow of water. A more insidious modification is the slowing of sediment deposition into the delta.
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The vernal equinox occurs in March in the Northern Hemisphere
Indicate whether the statement is true or false.
One of the major concerns about genetically modified organisms (GMOs) is the transfer of foreign genes to the wild relative of the crop plant.
Answer the following statement true (T) or false (F)
Taiga and tundra both ________
A) have many burrowing rodents B) are found in the southeastern United States C) have comparatively low temperatures throughout the year D) lack trees E) lack many birds
The only major group of species that has escaped increasing extinction threat are the primates, where less than 10% are currently threatened with extinction.
Answer the following statement true (T) or false (F)