Cardiac muscle
A. does not respond to nervous stimulation.
B. contracts slowly when it is stimulated.
C. cannot stay contracted.
D. is the same as skeletal muscle.
C. cannot stay contracted.
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Which mode of chromosomal evolution can create new proteins but also changes genome size?
A. None of these options change genome size B. Alloploidy C. Inversions D. Single-nucleotide substitutions E. Alternative splicing
A scientist is troubleshooting the synthesis of a cDNA library. The scientist performs both a Northern and a Southern blot. The Northern blot demonstrated the presence of RNA while the Southern blot indicated that no cDNA was present in the sample. What
is likely to be the cause of the failed synthesis of the cDNA library? A) temperature too cold for annealing B) defective reverse transcriptase C) proper primers D) too many dNTPs
Which white blood cell(s) is (are) the only
cell(s) that produces antibodies?
a. B cell b. T cell c. natural killer cell d. dendritic cell e. all of these
__________ allow animals of the same species to share information Fill in the blank(s) with the appropriate word(s)