If it were found that all animals except the Parazoa had a particular set of genes, one could conclude:
A. that those genes are not useful in interpreting phylogeny
B. that Darwin was incorrect in his idea about descent with modification
C. that the Parazoa are not animals
D. that those genes probably are related to the embryonic formation of tissues
E. None of the other choices offered are realistic
D. that those genes probably are related to the embryonic formation of tissues
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Mitosis comes from the Greek word “mitos,” which
means a. divide. b. grow. c. swell. d. thread. e. shrink.
Can the atomic mass of an element vary?
A) No, it is fixed. If it changes at all then you have formed a different element. B) Yes. Adding or losing electrons will substantially change the atomic mass. C) Yes. Adding or losing protons will change the atomic mass without forming a different element. D) Yes. Adding or losing neutrons will change the atomic mass without forming a different element.
Many early anthropoids have smaller eye orbits than earlier primates. The smaller eye orbits suggests they were
a. diurnal b. arboreal c. hunters d. going blind
Which statement best describes the concept of electron bifurcation?
A. A flavoenzyme oxidizes an electron donor and directs two electrons to a single, more electronegative recipient that releases energy for the production of ATP. B. A flavoenzyme oxidizes an electron donor and directs two electrons down a series of carriers creating a proton motive force. C. A flavoenzyme reduces an electron donor and directs two electrons to two different recipients, one being an exothermic oxidation that pulls the simultaneous endothermic oxidation to completion. D. A flavoenzyme oxidizes an electron donor and directs two electrons to two different recipients, one being an exothermic reduction that pulls the simultaneous endothermic reduction to completion.