Which group does not have tissues?
1.Phylum Cnidaria
2.Phylum Nematoda
3.Phylum Porifera
4.Phylum Platyhelminthes
3
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Which is the simplest of all levels of organization?
A. atom B. cell C. organ D. organism E. population
The principal government agency responsible for tracking infectious diseases in the United States is the
A. United States Department of Agriculture. B. Infection Control Committee. C. Centers for Disease Control and Prevention. D. World Health Organization. E. National Institutes of Health.
All of the following pertain to fluoroquinolones, except
A. they are broad spectrum. B. they are used to treat respiratory, urinary, and sexually transmitted infections. C. they are nephrotoxic. D. they are readily absorbed from intestines. E. they include ciprofloxacin and levofloxacin.
A Barr body
A. is an inactive Y chromosome that produces reduced amount of gene products. B. exists within the cell in the form of heterochromatin. C. exists within the cell in the form of euchromatin. D. is an inactive X chromosome that does not produce gene products. E. Two of the above answers are correct.