A population of bats evolves because organisms from a separate bat population move into the population. This mechanism of evolution is known as
A) natural selection.
B) mutation pressure.
C) genetic drift.
D) gene flow.
D
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Clouds in the tropics tend to move from east to west. Consequently, which of the following rhymes best describes a rainbow seen in the tropics?
A. Rainbow at dawn means rain is gone. B. Rainbow at break of day means rain is on its way. C. Rainbow with setting sun means sailors can have some fun. D. Rainbow in the morning means sailors take warning.
Which country is most likely to be associated with tin production?
A) Burma B) Brunei C) Philippines D) Laos E) Malaysia
What describes the formation of ice in a body of water that surges onshore and deforms the shoreline, and then retreats as the ice melts?
A. ice floe B. ice push C. ice pack D. glacial advance E. frost wedging
What is NOT true about the sediment budget of coastal depositional landforms?
A. Depositional landforms are largely in flux. B. Waves both deposit and remove sediment. C. Storms temporarily alter the sediment balance. D. Areas of deposit are not the same as areas of removal. E. Sediment budget is only stabilized by plant cover.