The orderly arrangement of organisms into groups through the use of a format that shows evolutionary relationships is called

A) phylogeny.
B) classification.
C) nomenclature.
D) morphology.


Ans: A) phylogeny.

Biology & Microbiology

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Chlamydia trachomatis causes

A. gonococcal urethritis. B. trachoma. C. dental caries. D. trachoma and nongonococcal urethritis.

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The separation of the Archaebacteria into a separate domain indicates

A) that these organisms are very different from eubacteria and from eukarys B) that organisms should never be classified according to how they appear (morphological characteristics) C) that early taxonomists rushed to classify them without closely examining them D) that optical viewing techniques have greatly improved so that we can better view these microorganisms E) none of the above

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A free nucleotide has a five-carbon sugar (deoxyribose), ____________________ phosphate group(s), and ____________ of four nitrogen-containing bases.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology