The relationship between the protistan zooxanthellae and the polyps of reef-building corals is best described as a/an ________
A) facultative ectoparasitism
B) facultative commensalism
C) obligate endoparasitism
D) mutualistic symbiosis
E) obligate commensalism
D
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In which of the following terrestrial ecosystems would one tend to find the highest net primary productivity?
A) Temperate grassland B) Tundra and alpine region C) Tropical seasonal forest D) Boreal forest
Which of the following is NOT one of the four dominant language families for the African region?
a. European b. Nilo-Saharan c. Niger-Congo d. Afro-Asiatic e. Austronesian
Which of the following was a major determinant of the early industrial regions of Europe?
A) coal B) a large labor force C) access to banking and finance D) mild climate E) All of the choices are correct.
High-energy waves of winter storms ________.
A. move sand from the beach out to bars B. hold sand on the beach and keep the beach stable C. move sand from bars onto the beach D. build sand spits and tombolos E. All of these are correct.