Heterotrophs include
A. consumers and decomposers.
B. consumers only.
C. producers and consumers.
D. producers only.
E. producers, consumers, and decomposers.
Answer: A
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Which creatures belong to the Phylum Platyhelminthes? Check all that apply.
_____ planarians. _____ monogeneans. _____ tapeworms. _____ trematodes. _____ ctenophores.
Place the layers of a mammalian gut in order, from the outermost layer to the lumen
a. mucosa ?submucosa ?muscularis?serosa b. muscularis?mucosa ?submucosa ?serosa
c. serosa ?muscularis?submucosa ?mucosa d. serosa ?mucosa ?submucosa ?muscularis e. serosa ?submucosa ?mucosa ?muscularis
The sea snail, Littorina saxatilis, is found on the coast of northern Spain. The snails farther upshore are large, with heavily ridged and banded shells, and share a border with the snails farther downshore that are smaller with smooth, unbanded shells. If the upshore and downshore snails became separate species, this would be an example of speciation.
A. sympatric B. parapatric C. allopatric D. prezygotic E. postzygotic
Some animals have no body symmetry or have __________ symmetry like a wheel. Fill in the blank(s) with the appropriate word(s)