Support for the succession mechanism of tolerance is found in research on plant communities that shows
A. the island biogeographic theory is generally supported.
B. turnover is not what would be predicted by other theories.
C. climax communities never form as predicted by Clements.
D. succession is determined largely by species that exist in the ground as seeds or old roots.
E. None of these choices are correct.
D. succession is determined largely by species that exist in the ground as seeds or old roots.
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____ is contained in anoxygenic bacteria and plays a similar role as chlorophyll in cyanobacteria
Fill in the blank with the appropriate word.
In the early 1950s, James Watson and Francis Crick ____
a. were awarded the Nobel Prize for Medicine or Physiology b. combined all of their previous research in order to explain the structure of DNA c. began to work out the structure of DNA by organizing the information about DNA that was already available d. produced X-ray diffraction photographs from highly purified DNA samples e. isolated two strains of S. pneumoniae and used them to further research the structure of DNA
During translation, which one of the following is required for translocation of the ribosome along the mRNA?
a. tRNA synthetase b. a translation initiation factor c. translation elongation factor EF-Tu d. translation elongation factor EF-G
Viral spikes are inserted into the host cell membrane before budding or exocytosis occurs.
Answer the following statement true (T) or false (F)