Give an explanation of why a population might have a clumped distribution in an area.

Well clumped distribution is distance between neighboring individuals is minimized. So when resources are low they will come together at one spot because that is were everything they need is   

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.

D.) domain, kingdom, phylum, class, order, family, genus, species