Which of the following statements about the evolution of complex multicellularity is true?
A. Complex multicellularity evolved
independently at least six times in different
groups of organisms.
B. Complex multicellularity evolved twice:
once in the common ancestor of plants and
fungi and once in animals.
C. Complex multicellularity evolved once in
the common ancestor of all eukaryotic
organisms.
D. Complex multicellularity evolved
independently in prokaryotes and eukaryotes.
E. Simple multicellular organisms evolved
from complex multicellular ancestors.
A
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Which one of the following types of organisms has been most damaged by the influence of humans?
A. rats B. corn C. cockroaches D. apples E. white rhinos
Which of the following is the correct order of the stages of meiosis?
a. prophase I, metaphase I, anaphase I, telophase I, cytokinesis, prophase II, metaphase II, anaphase II, telophase II, cytokinesis b. prophase I, prometaphase I, metaphase I, anaphase I, telophase I, cytokinesis, prophase II, prometaphase II, metaphase II, anaphase II, telophase II, cytokinesis c. prophase I, metaphase I, prometaphase I, anaphase I, telophase I, prophase II, prometaphase II, metaphase II, anaphase II, telophase II, cytokinesis d. prophase I, metaphase I, prometaphase I, anaphase I, telophase I, prophase II, metaphase II, prometaphase II, anaphase II, telophase II, cytokinesis
A skeleton has a faramen magnum tucked beneath the skull; this indicates that the skeletal remains are of a _____.
A. chimpanzee B. human C. lesser ape D. gorilla E. All answers are correct.
The condition known as graft-versus-host disease may result after
A) a bone marrow allograft. B) a mismatched blood transfusion. C) a bone allograft. D) a plasmapheresis procedure. E) any type of allograft procedure.