What does each landform in central america have

Central America has many volcanic mountain ranges; the longest are the Sierra Madre de Chiapas in Guatemala, El Salvador and Honduras; the Cordillera Isabelia in Nicaragua, and the Cordillera de Talamanca running through Costa Rica and Panama.

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Six amino acids have side chains that are polar but not charged. these are serine (ser), threonine (thr), cysteine (cys), asparagine (asn), glutamine (gln), and tyrosine (tyr). these amino acids are usually found at the surface of proteins, as discussed in the proteins 2 module.