Which two vessels systemically circulate blood and return it to the heart?
A. pulmonary vein and inferior vena cava
B. superior vena cava and pulmonary vein
C. aorta and inferior vena cava
D. inferior vena cava and superior vena cava
E. aorta and superior vena cava
D. inferior vena cava and superior vena cava
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Which of the following is true of the integration of a viral genome into the host chromosome?
A. Integration begins the process of host chromosome degradation. B. Integration of the viral genome is a form of site-specific recombination. C. The enzymes that are used in integration are nonspecific for the virus and its host. D. All of the choices are correct.
It now appears that the monocots branched off from
the a. ginkgos. b. cycads. c. eudicots. d. conifers. e. gnetophytes.
"Blood is thicker than water" is a true statement since blood contains many components that are more dense than water.
Indicate whether the statement is true or false.
Some aerobic bacteria lack the Entner-Doudoroff and Embden-Meyerhoff pathways and instead use the pentose phosphate pathway for glycolysis.
Answer the following statement true (T) or false (F)