Which of these is not considered a difficulty with the biological species concept?
A. fossil species
B. inbreeding species
C. asexual species
D. ring species
Answer: C. asexual species
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Answer the following statements true (T) or false (F)
1. and inactivated tumor suppressor genes, epigenetic changes in gene expression are seen in cancer. 2. In 2010, a federal judge in the U.S. ruled seven patents on the BRCA1 and BRCA2 genes had been improperly granted. 3. RNA interference was discovered in 1998. 4. Both gene silencing and genome editing techniques are limited by "off-target effects"—doing something other than what we want them to do.
During photosynthesis, carbon dioxide diffuses from the atmosphere into the leaves through pores called
A. plasmodesmata. B. stomata. C. companion cells. D. sieve tubes. E. guard cells.
Which test uses radioactive isotopes to label antibodies or antigens in order to detect minute amounts of corresponding antigen or antibody?
A.) Ouchterlony double diffusion B.) Western Blot C.) immunelectrophoresis D.) radioimmunoassay (RIA) E.) the Quellung test
Which of the following is the initiator codon?
A. UGA B. AUG C. UAA D. UAG