Using Table 13.1, determine which species has more genes than humans
A. baker's yeast (Saccharomyces cerevisiae)
B. mustard plant (Arabidopsis thaliana)
C. nematode worm (Caenorhabditis elegans)
D. fruit fly (Drosophila melanogaster)
E. gut bacterium (Escherichia coli)
B
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The vertebral column develops from
a. the notochord. b. the hollow, dorsal nerve cord. c. the gill slits. d. the tail. e. more than one of these
Each species occupies a certain __________characterized by physical and chemical features and by
the array of other species living in it. Fill in the blank(s) with the appropriate word(s).
The death rate from cervical cancer has decreased sharply since the mid-1960s, mainly as a result of _____.
A. Pap tests B. CT scans C. genetic mapping D. encephalograms
If chemical signals in the cytoplasm control the progression of a cell to the M phase of the cell cycle, then fusion of a cell in G1 with a cell in early M phase would most likely result in the
(A) replication of chromosomes only in the G1 cell (B) exiting of both cells from the cell cycle and into the G0 phase (C) condensation of chromatin in preparation of nuclear division in both cells (D) transfer of organelles from the G1 cell to the cell in the M phase