What texture is displayed by the igneous rock in this photograph?
A. breccia
B. porphyritic
C. glassy
D. vesicles
E. None of these choices are correct.
Answer: D
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Tube worms at seafloor vents get their energy by ____.?
A) ?catching small organisms for food B) ?absorbing the thermal energy of the heated water from the vent C) ?hosting chemosynthetic bacteria D) ?performing photosynthesis
Compare and contrast fissure eruptions and pyroclastic sheet deposits
The 100-year flood is the flood that occurred exactly 100 years ago
Indicate whether the statement is true or false
A small flock of birds becomes stranded on an isolated island during a hurricane. The birds successfully breed and spread across the island
Several decades later, a hurricane hits the island and randomly kills off most of the birds, including the only birds in the population that had black tails. Which one of the following processes is best illustrated in this example? A) Genetic drift B) Speciation C) Natural selection D) Gene flow