The scientist credited with the discovery of DNA, which he called "nuclein," from salmon sperm in 1869 is
A) Johann Friedrich Meischer.
B) Eduard Zacharias.
C) Fredrick Griffiths.
D) Martha Chase.
E) Oswald Avery.
A) Johann Friedrich Meischer.
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Small interfering RNA (siRNA) regulates gene expression by:
A. inhibiting transcription. B. inhibiting splicing. C. inhibiting translation by binding to RNA transcripts. D. inhibiting translation by degrading RNA transcripts. E. inhibiting rRNA synthesis.
Which of the following is not a major defining chordate characteristic?
a. blocks of muscles from myomeres b. a pair of eyes at the anterior c. a hollow, dorsal nerve cord d. a notochord e. a tail extending beyond anus
Centrioles are also called basal bodies
Indicate whether the statement is true or false
_________ speciation results when a population of a species is geographically isolated.
Fill in the blank(s) with the appropriate word(s).