A taxon that does not include the last common ancestor of all its members is a _____ group
A. monophyletic
B. paraphyletic
C. polyphyletic
C
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Homologues of the Sec protein translocation system are found in bacteria, eukaryotes, and archaea.
Answer the following statement true (T) or false (F)
How do bacteriophage influence bacterial evolution?
A) Bacteriophage cause cleavage and rearrangement of bacterial genomes, thus accelerating bacterial evolution. B) Bacteriophage lyse mutated bacterial cells, thus preventing them from replicating and passing on their genetic information. C) Bacteriophage transfer genetic information between bacterial cells through transduction, thus increasing the genetic diversity of bacterial populations. D) Bacteriophage decrease the size of bacterial populations and thus decreasing genetic diversity and slowing down bacterial evolution.
__________ are asymmetrical and do not have tissues or organs. Fill in the blank(s) with the appropriate word(s)
Fibers extending from cell pole to cell pole are called the
A. cleavage furrow. B. cell plate. C. cell equator. D. spindle.