Members of the baby-boom generation make up ____% of all adult Americans.
A. 6
B. 16
C. 25
D. 36
E. 46
Answer: C
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The present topography of the Appalachian mountains is due to ____
a. Cenozoic orogenies b. Mesozoic volcanism c. Cenozoic uplift and erosion d. Cenozoic volcanism e. glacial retreat
Genetically modified organisms are created by
A. injecting growth hormones into seeds or pregnant animals. B. inserting chemical pesticides into embryos to improve pest or disease resistance. C. cloning of good producers to make millions of offspring. D. inserting pieces of DNA, which will result in pest or disease resistance in a crop.
The major reason why large-scale areas of broadleaf evergreen trees occur only in the southern hemisphere is that ____
a. only ocean areas are found in the northern hemisphere at the latitude necessary for sustaining these forests b. broadleaf evergreen species are continentally isolated from the northern hemisphere c. ocean influence maintains the moderate temperatures needed by this type of tree d. large areas of these trees in North America were cleared for cultivation e. they prefer the higher elevations found in the Southern Hemisphere
Why are the wild orangutans of Borneo endangered?
A) tin mines B) palm oil plantations C) oil and gas extraction D) gold, silver and nickel mining E) none of the above