Which of the following is not a characteristic of normal cells?
A. They grow as a monolayer.
B. They grow as multiple layers.
C. They undergo a limited number of divisions and then die.
D. They stick tightly to the surface of glass culture dishes.
B
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The optimum temperature is usually closer to the minimum temperature than the maximum temperature
Indicate whether the statement is true or false.
In the following gene sequence, the original sequence is ABC* DEFGH. It now reads ABC* DGFEH. The * indicates the centromere. This type of mutation is a(n)
A) nonsense mutation. B) inversion. C) translocation. D) duplication. E) point mutation.
Within the vestibular system of vertebrates, hair cells help detect movement when their cilia are bent by
A. otoliths. B. statoliths. C. the tectorial membrane. D. the basilar membrane. E. gravity.
Which theory was helpful to Darwin in the formulation of his theory of evolution?
a. catastrophism b. inheritance of acquired characteristics c. uniformitarianism d. continental drift e. special creationism