Using the Darwin-Wallace mechanism of natural selection, describe how the long necks of giraffes evolved. What will be an ideal response?
In the population of ancestral giraffes there was some natural variation; some of the animals
had longer necks than others. Those with longer necks could reach higher into trees and eat
leaves that their competitors couldn’t reach. These longer-necked animals were more
successful, so they survived and reproduced. Finally, after many generations, the animals
looked like modern giraffes.
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Our solar system is the center of the universe
a. True
b. FalseHurricane Sandy produced some of the greatest destruction along the New Jersey coast in communities situated along narrow strips of land between the beach and a coastal lagoon to the west
These communities were vulnerable because they were built on low-lying terrane of ________. A) a wave-cut platform B) an eroding sea cliff C) a barrier island D) spits and tombolos
Imagine a section of highway with a large outcrop of fractured rock that poses a serious rockfall hazard. Which of the following engineering controls would be the best choice for minimizing the chance of large rocks falling onto the roadway?
A. build a retaining wall B. control the flow of water C. cover the slope with vegetation D. install a mesh fence E. install rock bolts
Malthus contended that
A. humans can produce babies faster than they can produce commensurate amounts of food. B. poverty causes resource depletion rather than the reverse. C. by providing additional workers, human population growth enhanced economic development.