Nonfunctional copies of normal genes, which lack both introns and promoters, and are important in estimating evolutionary ages of phylogenetic relationships, are ________

A) transgenes
B) retrotransposons
C) processed retrogenes
D) processed pseudogenes
E) duplicated pseudogenes


D

Biology & Microbiology

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The basilar membrane has varying flexibility. Activation of different regions of the basilar membrane enable perception of sounds of different:

A. pitch B. amplitude C. intensity D. loudness

Biology & Microbiology

All of the following are effective for destroying prions EXCEPT

A) boiling. B) incineration. C) NaOH + autoclaving at 134°C. D) proteases. E) None of the answers are correct; each of these will destroy prions.

Biology & Microbiology

The retina is indicated by the letter ____

a. A b. B c. C d. D e. E

Biology & Microbiology

Which of the following reflects genetic differences?

a. phenotypic variation among organisms b. genotypic variation among organisms c. genotypic and phenotypic variation among organisms d. genotypic and phenotypic variation among populations

Biology & Microbiology