Monthly and seasonal forecasts make specific predictions of rain or snow
a. True
b. False
ANSWER: False
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In North America, many kinds of birds have closely related eastern and western counterparts (species or subspecies) that sometimes produce hybrid offspring where their ranges overlap
Eastern and western meadowlarks are virtually indistinguishable from each other in appearance, and yet, despite the fact that their ranges overlap throughout much of the Midwest, there are few documented cases of the meadowlark counterparts mating with each other and producing hybrid offspring. Propose mechanisms that would prevent cross-breeding between eastern and western meadowlarks, thus maintaining the counterparts as separate species.
The North Atlantic Current is an example of which of the following types of currents?
A) Eastern Boundary Current B) Equatorial Counter Current C) Northern Boundary Current D) Southern Boundary Current E) Western Boundary Current
Scientists typical do not use a specific environmental bioassay to draw general conclusions about a pollutant because they ________
A) are specific to all creatures in an ecosystem B) can be performed quickly with little effort C) may result in data that isn't applicable to other species D) only predict the long-term effect of pollution on marine organisms E) take into account how pollutants may combine to create new pollutants
________ indicates that the core of the Earth is a liquid.
A. Density calculations B. The P-wave shadow zone C. Studies of meteorites D. The S-wave shadow zone E. The Earth's heat flow