In which cells would you expect to find the highest level of telomerase?

A. adipose tissue cells
B. muscle cells
C. cells that replenish the lining of the gut
D. neurons


Answer: C

Biology & Microbiology

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Plant activities that follow a biological clock so that they are based on cycles of about 24 hours are ____

a. gravitropisms

b. photoperiodisms c. thigmotropisms d. circadian rhythms e. phototropisms

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Which parts on the phylogenetic tree represent points in evolution where researchers believe ancestors diverged?

a. leaves b. nodes c. branches d. stems

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The tall ferns that we typically see in the tropics and temperate woodlands are the ________.

A. gametes B. spores C. sporophytes D. gametophytes

Biology & Microbiology

Which of these is a type of posttranscriptional regulation of gene expression?

A) inactivation of tRNA B) alteration of DNA nucleotide sequences C) breakdown of proteins D) binding of transcription factors to enhancers

Biology & Microbiology