Select all of the ways by which muscles help maintain body temperature.
Ans: shivering
constricting blood vessels
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The nucleophile of the first step of spliceosome-mediated pre-mRNA splicing is the:
A. 2' hydroxyl of the branch point adenosine. B. 3' hydroxyl of a free guanine nucleotide. C. 3' hydroxyl of the 5' splice site exon. D. 2' hydroxyl of the 3' splice site intron.
DNA polymerases add new nucleotides in what direction?
A. 5' to 3' B. 3 ' to 5' C. Both directions
Sphincters
a. are muscles in longitudinal arrangement. b. prevent movement of material through the digestive tract. c. are smooth muscles. d. are only found at the beginning of the stomach. e. can contract but not relax.
In any physical or chemical change, energy cannot be created or destroyed. This is the ________ law of thermodynamics
Fill in the blank with correct word.