Which description is CORRECT about the trophic numbers of different species？
A. Tigers are at level 5 because they prey on apes.
B. Herbivores are level-2 animals that feed on plants.
C. The actual trophic score of foxes might be almost 4.
D. Insectivores eat multicellular plants and occupy level 2.
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If our global population becomes more carnivorous, humans will face all the following threats EXCEPT that
A. large acres of woods will be cut down.
B. the number of livestock will decrease.
C. enormous resources will be consumed.
D. more green house gases will be emitted.
Nowadays, biologists tend to believe that humans
A. occupy the top of the food chain.
B. inhabit the same level as anchovies.
C. rank above autotrophs and herbivores.
D. move up to the trophic level of pigs.
Greater London is NOT______of the United Kingdom.
A. the administrative center
B. the most important port
C. the financial center
D. the transportation center
Since the mid-19th century, the Whigs and the Tories became______.
A. the Liberal Party and the Conservative Party
B. the Liberal Party and the Republican Party
C. the Democratic Party and the Republican Party
D. the Democratic Party and the Conservative Party
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