Red algae ____.
A. are primarily marine organisms
B. are thought to have developed from green algae
C. contain xanthophylls as their main accessory pigments
D. are mostly unicellular
E. survive only in shallow water
Answer: A
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The photosynthetic pigments bacteriorhodopsin and proteorhodopsin are present in ________ and ________, respectively
A) Archaea / Bacteria B) Bacteria / Archaea C) Bacteria / Bacteria D) Bacteria / Eukarya
A reinterpretation of animal phylogeny (differing from morphologically based phylogeny) that was made possible by molecular techniques, was:
A. designation of the Ecdysozoa and Lophotrochozoa as clades B. designation of the Bilateria as a monophyletic group C. designation of annelids and arthropods as closely related D. designation of rotifers and nematodes as closely related E. placement of echinoderms and chordates in entirely different clades
The process of translation refers to the use of information encoded in ____ to make ____
a. RNA; a complementary DNA copy b. DNA; a polypeptide c. DNA; a complementary RNA copy d. a polypeptide; RNA e. RNA; a polypeptide
Although bees carry pollen from tulip flowers to the blossoms on cherry trees, hybrid seeds are not produced because of
A) gametic isolation. B) temporal isolation. C) ecological isolation. D) mechanical isolation. E) All of these