One of the primary functions of RNA molecules is to _____
A) transmit genetic information to offspring
B) function in the synthesis of proteins
C) make a copy of itself, thus ensuring genetic continuity
D) act as a pattern or blueprint to form DNA
B
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Organisms that are found together and interact on a more or less permanent basis are in a relationship termed
A. mutualism. B. parasitism. C. symbiosis. D. transient microbiota.
Protobionts are thought to be the first nonliving structures that evolved into living cells. A critical characteristic of a protobiont that is found in both modern day prokaryotes and eukaryotes is
A. internal compartments that subdivide metabolic functions. B. a boundary membrane that separates external from internal environments. C. the ability to exclude all organic substances. D. the ability to fuse with any other protobiont for reproduction. E. the ability to recognize other protobionts for developmental purposes.
The organ of Corti ____
a. is integral to balance b. controls the sense of depth perception c. has hair cells that fire and sends signals to the brain d. is involved in visual acuity e. detects light energy
A disease that has a steady frequency over time in a particular geographic location is referred to as ________.
A. endemic B. chronic C. pandemic D. sporadic E. epidemic