A taxon that diverges earlier than the other taxa being considered in cladistic analysis is:
a. a homologous taxon.
b. an outgroup.
c. a derived taxon.
d. an Amphioxus.
e. a clade
B
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When blood returns from the pulmonary circuit, it first enters the ____ chamber of the heart
a. left atrium b. left ventricle c. right atrium d. right ventricle e. both the left atrium and the right atrium
The first class of drugs developed to treat AIDS, such as AZT, were known as reverse transcriptase inhibitors. They worked because they _____
A) targeted and destroyed the viral genome before it could be reverse transcribed into DNA B) bonded to the dsDNA genome of the virus in such a way that it could not separate for replication to occur C) bonded to the viral reverse transcriptase enzyme, thus preventing the virus from making a DNA copy of its RNA genome D) prevented host cells from producing the enzymes used by the virus to replicate its genome
What is meant by the term heterogeneous nuclear RNA (hnRNA)?
What will be an ideal response?
Which type(s) of mutation might lead to a threonine auxotrophic revertant?
A. Base substitution B. Missense mutation C. Point mutation D. All of the choices are correct.