Which muscles may contract during inspiration?
(a) external intercostals.
(b) internal intercostals.
(c) abdominal.
(d) both b and c.
(a) external intercostals.
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Choose the pencil that has the lowest potential energy.
A. A pencil hitting the ground after falling from your desk B. A pencil on your desk C. A pencil falling from your desk D. A pencil laying on the ground
Tetracycline and chloramphenicol are the drugs of choice for the treatment of many of the rickettsial diseases
Indicate whether the statement is true or false.
For bacteriophage with +ssRNA as their genome, which type of nucleic acid is used as the template for the production of more genomic RNA?
A. ?ssRNA B. dsDNA C. ?ssDNA D. dsRNA
What is the type of speciation that can occur in an instant with a change in chromosome number?
A. Temporal B. Mechanical C. Behavioral D. Ecological E. Sympatric