Organic molecules with identical molecular formulas and mirror-image structures are referred to as

A. polymers.
B. complements.
C. enantiomers.
D. double helices.
E. isotopes.


Answer: C

Biology & Microbiology

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Unlike members of the Bacteria, most archaeons have linear chromosomes with multiple origins of replication.

Answer the following statement true (T) or false (F)

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Tracheophyte plants are characterized by all of the following except 

A. specialized conducting systems. B. waxy cuticle. C. stomata. D. homospory or heterospory. E. seeds.

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The oldest well-documented flowering plant fossils are Archaefructus, dating to about

a. 1.5 billion years ago. b. 420 million years ago. c. 250 million years ago. d. 125 million years ago. e. 17 million years ago.

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Humans belong to which of the following domains?

A) Bacteria B) Archaea C) Eukarya D) vertebrates

Biology & Microbiology