The cause of schistosomiasis is a ____
a. fluke
b. tapeworm
c. planarian
d. leech
e. roundworm
ANSWER: a
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Tetrapod digits are known to be
a. an entirely novel evolutionary structure d. controlled by genes present in the common ancestor of primates b. controlled by the Pitx1 gene e. the result of a mutation in a Hox gene c. controlled by genes that were present in the common ancestor of sharks
What percentage of fruit fly genes have
homologous genes that can be found in humans?
a. 10 b. 20 c. 30 d. 40 e. 50
Radiometric dating ____
a. is based on the premise that each isotope decays at a constant rate b. is unpredictable because of changes in temperature and pressure c. can be used to date sedimentary rock, but not fossils d. has a substantial error factor e. can only be used for dating animal fossils
The waste product of microbial decomposition is converted to what in acidic soils?
A) NH4+ B) NH3 C) NO42- D) NO3-