In a eukaryotic genome, DNA replication starts at
A) a single origin of replication.
B) one replication fork per chromosome.
C) nucleosomes.
D) multiple sites along the length of each chromosome.
D) multiple sites along the length of each chromosome.
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The formation of polyploids in plants is an example of which model of cladogenesis?
A. Parapatric speciation B. Allopatric speciation C. Sympatric speciation
The anatomical structure identified with the
letter "R" in the figure above is the a. cardiac muscle. b. pulmonary veins. c. inferior vena cava. d. right atrium. e. heart apex.
Which of the following enzymes catalyzes the production of a strand of RNA from DNA?
A) RNA polymerase B) DNA ligase C) DNA polymerase D) reverse transcriptase
The inheritance patterns of genetic material that is not contained in the nucleus of the cell is called _______
A. extranuclear inheritance B. maternal effect C. imprinting D. nuclear E. epigenetic