An individual coral animal is known as a(n) ________.
A. zooxanthella
B. sponge
C. zooxanthella or polyp
D. alga
E. polyp
Answer: E
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There are four levels of regional economic integration. What is their order, from lowest to highest level of integration?
A) (1)Customs union; (2)Free trade area; (3)Common market; (4)Economic Union B) (1)Common market; (2)Customs union; (2)Free trade area; (4)Economic Union C) (1)Free trade area; (2)Customs union; (3)Common market; (4)Economic Union D) (1)Free trade area; (2)Customs union; (3)Economic Union; (4)Common market E) (1)Economic Union; (2)Common market; (3)Free trade area; (4)Customs union
The length of a tidal day for a mixed semidiurnal tide is ________ hours.
A. 12.4 B. 48 C. 24.8 D. 12 E. 24
According to the figure, what level of pollution reduction comes at the highest cost?
A) From 60% to 80% pollution reduction B) From 20% to 40% pollution reduction C) From 80% to 100% pollution reduction D) The first 20% of pollution reduction
An example of a silicate mineral with a double-chain structure is:
a. augite b. hornblende c. corundum d. plagioclase feldspar