Giraffa is a taxon at which level?
a. order
b. family
c. species
d. class
e. genus
Ans: e. genus
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Which of the following types of experimental evidence suggests that a particular organism thought to be part of the human microbiome is, in fact, just a laboratory contaminant?
A. Absence of ribosomal RNA evidence in a specific host location where the organism was not expected to have colonized B. Absence of ribosomal RNA evidence in a specific host location where the organism was believed to have colonized C. Presence of ribosomal RNA evidence in a specific host location where the organism was believed to have colonized D. Presence of ribosomal RNA evidence in a specific host location where the organism was not expected to have colonized
All of the following are required for the Calvin cycle EXCEPT
A. CO2. B. H2O. C. ATP. D. NADPH. E. rubisco.
Srb and Horowitz’s research led to the ____ hypothesis, which has since been modified to the ____ hypothesis
a. one gene-one enzyme; one gene-one polypeptide b. one gene-one polypeptide; one gene-one enzyme c. one gene-one protein; one gene-one enzyme d. one gene-one polypeptide; one gene-one protein
e. one gene-one enzyme; one gene-one proteinAs men age, the prostate may enlarge but not become cancerous. This enlarged prostate may result in ________
A) sterility B) difficulty with urination C) impotence D) constipation