Which of the following is a typical means of halting normal cell division?
A) the shortening of telomeres
B) increasing the activity of p53
C) activating oncogenes
D) triggering apoptosis
A
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Acetogens can ferment glucose into acetate, but methanogens cannot
Indicate whether the statement is true or false.
Fecal coliforms are useful indicator organisms for the contamination of water by ________.
A. sewage B. agricultural fertilizer runoff C. phosphates D. All of these choices are correct.
What molecule provides the energy to form charged tRNAs?
What will be an ideal response?
Which of the following describes the order of emergence of various organisms on Earth?
a. land plants, first prokaryotes, animals, first eukaryotes, humans b. first prokaryotes, first eukaryotes, land plants, animals, humans c. animals, first prokaryotes, first eukaryotes, land plants, humans d. humans, animals, land plants, first eukaryotes, first prokaryotes