Which of these scenarios can occur when a keystone species disappears from an ecosystem? Assume a time frame 100 years between the disappearance and resulting effects.
A. Other species go extinct.
B. The population of the rest of the species explodes.
C. Speciation occurs.
D. Native species become invasive species.
Answer: A
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Although both are coastal cities, compared to Oakland, Norfolk has a very “continental” temperature pattern. Why?
Six charts showing the average monthly temperature (in °C and °F) for seven U.S. cities are provided (the first letter of each month of the year is shown along the bottom of the charts). For each of the cities, the latitude and longitude, as well as the elevation, are provided.
Answer the question by comparing the temperature charts. In your answers, consider the one temperature control factor that is most responsible for the patterns shown (choose from latitude, land–water contrasts, wind patterns, or altitude). You may use the same answer for more than one question. You should locate each of the cities on a world map before trying to answer the question. If altitude is the main factor cited, calculate the expected temperature difference between the two cities based on the average lapse rate.
True or False: Earthquake body wave records allow scientists to construct an image of Earth's interior
Indicate whether this statement is true or false.
Most of the tall grass prairie of North America has been converted to ________
A) tropical rain forest B) tundra C) desert D) farmland E) savannas
Tides ________
A) produce currents scouring the bottom B) are significant on large lakes C) are unpredictable in occurrence D) are of approximately equal amplitude on all seacoasts E) do not occur in estuaries