Members of this phylum have radial symmetry and nematocysts; they may have polyp or medusa
forms (or both) as adults.
a. Nematoda
b. Cnidaria
c. Porifera
d. Rotifera
e. Ctenophora
B
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As the global concentration of carbon dioxide increases, there is great potential for direct impact on the world's
A. climate. B. biodiversity. C. biogeochemistry. D. ozone layer.
The only known human pathogen that preferentially attacks the peripheral nerves is
A. N. meningitidis. B. polio virus. C. E. coli. D. M. leprae.
Most cases of Salmonella gastroenteritis have a(n)
A. water source. B. human source. C. plant source. D. animal source.
For three genes known to be on the same chromosome, you obtain the following percentages for recombination events. What is the order of genes on this chromosome?
no observable recombination 30% between A and B 15% between B and C 35% between A and C 20% A) ABC B) ACB C) BAC D) BCA E) The gene order cannot be determined from this information.