Researcher discovers a new unicellular organism that contains a single circular chromosome and no membrane-bound organelles. Upon closer observation, the researcher notices that this organism can also fix nitrogen and produce methane
How should this
organism be classified?
A. as a bacterium
B. as an archaeon
C. as a eukaryote
B
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Dyneins are
A) associated with organelle movement. B) associated with cilia and flagella. C) monomeric myosin-like proteins. D) responsible for anterograde transport. E) all of the above
DNA replication occurs in the ________ of the cell cycle
Fill in the blank(s) with correct word
The number of the greater prairie chicken, a bird found in the prairies of Illinois, was drastically reduced during the 19th and 20th centuries due to hunting and habitat destruction. The number of the birds went from millions to fewer than 50. When the population rebounded to over 5,000, more than 30% of the alleles were lost forever. The allele loss in the above example is mostly due to__________________.
A. More information needed. B. Natural Selection C. Sexual Selection D. Genetic Drift
The double helix model of DNA suggested by Watson and Crick was exciting to the scientific community because:
a. it opened the door to new PCR based technologies. b. it explained how genetic material could be duplicated by means of the complementary strands. c. it suggested the role of DNA in protein synthesis. d. it proved once and for all that DNA was the messenger of heritable traits. e. All of the above are correct.