Unlike terrestrial communities, aquatic communities are rarely determined by the physical characteristics of the environment (other than the water itself).
Answer the following statement true (T) or false (F)
False
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What was the cause of flooding in the 1993 upper Mississippi River flood?
A) Heavy snowmelt in Canada sent large volumes of water down the river in the spring. B) A dam failed because it had been built in a risky place near a fault. C) Persistent thunderstorms caused large amounts of rainfall over a several-state region. D) Winter produced rain that melted snow that was on the ground.
The coal deposits of Siberia were probably derived from plants that grew in arctic climates
a. True b. False
In North America, a toxic weed called leafy spurge was accidentally introduced and has grown and spread rapidly, covering millions of acres in north central United States and south central Canada. Leafy spurge is generally avoided by cattle and horses and may be toxic to them. Thus, rangeland where leafy spurge has spread has been damaged by the invasion of this plant. Flea beetles alone are unlikely to eliminate all of the leafy spurge in a region. Instead, the number of leafy spurge plants and the number of flea beetles in a particular community may stabilize. At this point, the leafy spurge and flea beetle populations
A. have exhibited exponential growth followed by a crash. B. have experienced constant growth. C. are still experiencing exponential growth. D. are experiencing environmental resistance.
To calculate average global temperature, climatologists:
A) divide the global map by proximity to the ocean. B) divide the global map into regions by their elevation. C) divide the global map into 5° by 5° boxes, making a grid system. D) divide the global map by surface type.