The largest blood vessel in the human body is the
A) superior vena cava.
B) pulmonary vein.
C) aorta.
D) pulmonary artery.
Answer: C
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Which of the following statements about RNA polymerase in bacteria is INCORRECT?
A. It binds the promoter region of a gene. B. It is bound to a sigma factor during initiation of transcription. C. It synthesizes RNA. D. It catalyzes the addition of nucleotides to the 5? end of a growing RNA strand. E. It dissociates from the DNA at the terminator.
The patterns by which muscles connect to bones are the same in all vertebrates
Indicate whether the statement is true or false.
A pine tree is called a sporophyte because it
a. develops from a germinated spore. b. produces spores by meiosis. c. is haploid. d. undergoes fertilization. e. reproduces by both sexual and asexual means.
Activation of B cells can occur when antigen binds to B cell surface immunoglobulin receptors.
Answer the following statement true (T) or false (F)