<span>Parasympathetic nervous system
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The nervous system has three general functions: a sensory function, an interpretative function and a motor function. 1. Sensory nerves gather information from inside the body and the outside environment. The nerves then carry the information to the central nervous system (CNS). 2. Sensory information brought to the CNS is processed and interpreted. 3. Motor nerve cells convey information from the CNS to the muscles and glands of the body. The nervous system is responsible for coordinating all of the body's activities.</span>
Answer:
The principal functions of the gastrointestinal tract are to digest and absorb ingested nutrients, and to excrete waste products of digestion. Most nutrients are ingested in a form that is either too complex for absorption or insoluble, and therefore, indigestible or incapable of being digested.
The correct answer to two proteins that share 30% amino acid identity are 30% homologous is false.
Although homology can be inferred from excess similarity and excess similarity can be recognized from statistical estimates (E()-values), most researchers prefer to describe similarity in terms of "percent identity." Although it is a common rule of thumb that two sequences are homologous if they are more than 30% identical across their entire lengths (much higher identities are seen by chance in short alignments), the 30% criterion misses many easily detectable homologs. While 30% identical alignments over more than 100 residues are almost always statistically significant, many homologs with E()-values 1010 that are not 30% identical are readily found. As a result, E()-values and bit-scores (described below) are far more useful for inferring homology.
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