A gene that produces a protein that is important in more than one biochemical pathway, or other trait, is a ___ gene.
a. pleiotropic
b. recessive
c. codominant
d. incomplete dominant
e. dominant
Answer: a. pleiotropic
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A carbon atom has an atomic number of 6 and an atomic mass of 12. Assuming it is neither an ion nor part of a molecule, how many electrons does it have?
a. four b. five c. six d. eight
Four of the five answers listed below are parts of the same sense organ. Select the exception
a. fovea b. retina c. vitreous body d. ampulla e. iris
The phylum of organisms most closely linked to the evolution of land plants is the
a. Chlorophyta. b. Charophyta. c. Phaeophyta. d. Euglenozoa.
Most precipitation reaching land results from
A) evaporation of surface water over land. B) upwelling of freshwater. C) atmospheric synthesis of water. D) evaporation of water from oceans. E) evaporation of water from plants during photosynthesis.