Quagga mussels ________
A) cause a decline in aquatic plants in lakes that they have invaded
B) were brought over from the Black Sea in an effort to eradicate zebra mussels
C) are invasive mussels that are replacing zebra mussels in many areas
D) are native mussels being replaced in many areas by zebra mussels
E) feed on bottom-feeding fish and cause declines in their populations
Answer: C
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Which of the following sites would most likely have less dangerous volcanoes? A is on an island arc, B is in the Andes, C is near Hawaii, D is along a midocean ridge.
A) A and B
B) B and C
C) C and D
D) A and C
E) B and D
A label of "biodegradable" ensures that a product will naturally break down in the environment within a few years.
Answer the following statement true (T) or false (F)
Satellite images taken of clouds at night use:a
reflected visible light. b. reflected infrared light. c. emitted infrared light. d. microwave radiation.
Most magma is generated in Earth's upper mantle by ________ of solid rock
A) decompression melting B) partial melting C) diffusion D) crystallizing