In a system, fish feed on shrimp that feed on the bacteria. This food chain represents a
A) tertiary consumer eating a secondary consumer, which eats a primary consumer.
B) primary consumer eating a secondary consumer, which eats a tertiary consumer.
C) consumer eating a producer, which then consumes chemoautotrophic bacteria.
D) second order consumer eating a first order consumer, which then eats a producer.
D
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On this map of earthquakes near Japan, why do shallow earthquakes occur to the east and deeper earthquakes occur to the west?
A. The subduction zone dips to the west. B. The crust is hotter near Japan, closer to the volcanoes. C. The continental crust is thicker to the east. D. There is a continental collision to the east.
Population in census tracts rarely exceeds
A) 500. B) 1,000. C) 2,500. D) 5,000. E) 50,000.
Which country's inhabitants are more likely to have the largest ecological footprint (EF)?
A. Australia B. China C. India D. Kenya
A projectile is fired vertically from the surface of Earth at 10 km/s. The projectile will
A) go into circular orbit about Earth. B) go into an elliptical orbit about Earth. C) rise and fall back to Earth's surface. D) none of the above