The urinary tract above the bladder usually shows
A.
Escherichia coli.
B.
Staphylococcus aureus.
C.
Proteus vulgaris.
D. no bacteria.
E.
Escherichia coli AND Staphylococcus aureus.
D.
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The per capita growth rate of a population is best defined as
A. the change in population size per unit time. B. having a constant value for a particular species. C. per capita birth rate minus per capita death rate. D. growth rate when a population is at equilibrium. E. logistic growth.
The four subunits that make up DNA are called
A) phosphodiesters. B) proteins. C) nucleotides. D) nucleosides. E) polymers.
Fossils older than ____ cannot be dated by their 14C content because ____
a. 60,000 years; most of the 14C has decayed by this time b. 12,000 years; half of the 14C has decayed by this time c. 6,000 years; older fossils do not contain carbon d. 2,000 years; most of the 14C has decayed by this time e. 500 years; half of the 14C has decayed by this time
zea mays is the scientific name of the corn plant. Zea is the __________ name
a. class b. division c. genus d. ordinal e. species