A tumor is actively producing both VEGF and FGF, factors that stimulate angiogenesis, but no new network of blood vessels to the tumor has been established in spite of the fact that blood vessels are nearby. This observation suggests that most likely
A) the cancer cell versions of the VEGF and FGF are not functional.
B) only VEGF or EGF is active but not both.
C) p53 is overexpressed.
D) angiostatin is present in greater concentration.
E) the tumor has been established by metastasis of a cell from a distant tumor.
Answer: D
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Cells in this tissue may have cilia
a. A b. B c. C d. D e. E
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How do adult predaceous diving beetles (Dytisidae) breathe underwater?
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