Differences in morphology are, of course, the developmental products of genetic differences between animals, but for a very long time it was not understood how many or what
kinds of differences underlie changes in body patterns.
Should an ETF's share price dip below its NAV, APs can make money on the
difference by buying up shares
of the ETF on the open market and trading them into the issuer for an «in
kind» exchange
of the
underlying bonds.