Radioisotopes have a number of uses in science and medicine. These uses include which one of the following?
A) repairing damaged heart tissue
B) dating fossils and treating cancer
C) providing the power supply in heart pacemakers
D) treating asthma and regulating nerve transmission
E) curing diabetes
B
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What is the function of cyclic dimeric GMP in bacterial global regulation systems?
A. It converts GTP to cGTP. B. It acts as a secondary nucleotide messenger. C. It is a sensor kinase. D. It is an autoinducer.
Ribozymes may have originally developed by
a. ATP synthesis. b. the chance assembly of RNA molecules. c. cellular respiration. d. glycolysis. e. electron transfer systems.
The portion of potential resources and conditions that an organism actually exploits as a result of interactions with other species is its
A) home range. B) territory. C) realized niche. D) fundamental niche.
A cladogram is the name of a taxonomic category into which organisms are placed when their evolutionary relationships to each other are being investigated.
a. true b. false