________ is primarily responsible for spreading thousands of invasive alien species around the world.
Fill in the blank(s) with the appropriate word(s).
Globalization
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Why are diamonds so hard?
A) They are formed under very cold conditions. B) They are held together by strong metallic bonds. C) They are held together by strong ionic bonds. D) They are held together by strong covalent bonds.
Which of the following is not a baleen whale?
A) Blue whales B) Fin whales C) Gray whales D) Right whales E) Sperm whales
This volcano is relatively small and composed of volcanic cinders. What kind of volcano is it?
A) Cinder cone
B) Shield volcano
C) Composite volcano
D) Volcanic dome
E) Caldera
A warmer ocean has been linked to ________.
A. decreases in disease outbreaks B. increases in nutrients from deep-water sources C. migration of species poleward and deeper D. declines in the microbial loop