Pseudogenes are evidence of
A) gene duplications.
B) integrated viruses, or proviruses.
C) natural selection for functional genes.
D) de novo genes.
E) proteins that are produced but have no function.
A) gene duplications.
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The evolution of angiosperms increased the productivity of terrestrial ecosystems
A. true B. false
What is the source of energy for the synthesis of organic molecules in a photoautotroph?
A. carbon dioxide B. inorganic compounds C. other organic compounds D. light E. heat
Water that moves through nonliving regions of root, such as air spaces in root tissue, is following the
a. symplastic pathway. b. transmembrane and symplastic pathways. c. transmembrane pathway. d. apoplastic, transmembrane, and symplastic pathways. e. apoplastic pathway.
The dominant herbivores in savannas are
A) gophers. B) insects. C) antelope. D) giraffes.