The City of London is a small portion of the metropolitan region of London, which is located in England, in the United Kingdom. There are also many other cities and towns arou â¦ nd the world that are called London because they were settled by or built by people from England.he City of London is a small portion of the metropolitan region of London, which is located in England, in the United Kingdom. There are also many other cities and towns arou â¦ nd the world that are called London because they were settled by or built by people from England.
allopatric speciation happens when a physical barrier divides two populations of the same species and sympatric speciation happen when no physical barrier divides the member of a population, but methods such as polyploidy (chromosome doubling) do not let the members of the species have fertile offspring, 2 species are formed (the parental normal species and the divergent species polyploids).
In another words, there is only one possible that make aRb and bRa in R is a=b, if a is not equal to b, then it must not be in the relation R. Antisymmetry is different from asymmetry. According to one definition of asymmetric, anything that fails to be symmetric is asymmetric. Another definition of asymmetric makes asymmetry equivalent to antisymmetry plus irreflexivity. Antisymmetry and symmetric has only one intersection, that is the equality relation.