What is the mechanistic theory?
a. Cancer spreading is determined by the pattern of blood flow
b. Fertile environment in which compatible tumor cells could grow
c. Age and gender determines the spread of disease
d. None of the above
Ans: a. Cancer spreading is determined by the pattern of blood flow
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Which of the following pairs of organisms excrete nitrogenous wastes in the form of uric acid?
A) mice and birds B) insects and birds C) lions and horses D) humans and frogs E) fish and turtles
Which group of organisms is difficult to control through immunization because of their rapid and unpredictable genetic mutations?
A) vector-borne organisms B) RNA viruses C) Archaea D) DNA viruses
Place the five steps in building a phylogenetic tree in the proper order, from first construction step to last._____ The nucleotide or amino acid sequence must be aligned._____ Application of a selected method, using computer analysis._____ The alignment must be examined for a phylogenetic signal._____ Manual examination of the tree._____ Choose which tree-building method to use (common ones are phenetic or cladistic.)
Fill in the blank(s) with the appropriate word(s).
Malignant breast, colon, and lung cancers typically have
A) mutated tumor suppressor genes. B) active oncogenes. C) chromosomal abnormalities. D) activated telomerase. E) All of these