Which of the following best describes mycorrhizae?
A) Pathogenic soil bacteria and fungi that destroy plant roots
B) Common in soils that lack a functional humus
C) Symbiotic fungi that increase soil nutrient uptake in plant roots
D) Important soil millipedes that increase aeration of topsoil
C
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What is the main way that position of the continents can influence global sea level?
A) Clustering of continents near the poles causes the planet to bulge near the equator, causing sea level to rise since more of the equatorial area is oceanic. B) Continents near the equator receive higher amounts of rainfall. C) Continents at high latitudes provide a setting in which large ice sheets can form. D) Clustering of continents near the poles causes ocean temperatures to fall substantially.
Throughout history, cities have ________
A) been self-sustaining in food production B) been major sources of labor for the rural areas surrounding them C) destroyed the rural areas surrounding them through conquest or politics D) had disagreements with the rural areas surrounding them E) drawn resources from surrounding agricultural areas
Although ectotherms can tolerate large ranges in external temperature, they are unable to sustain large
fluctuations in their internal temperatures. Indicate whether the statement is true or false.
In recent years, the economy of Atlantic City has begun to recover from the slump it faced after WWII. What economic sector is responsible for this recovery?
A) Primary B) Secondary C) Tertiary D) Quaternary