What is the relevance of the centum-satem isogloss?

one source of error that affected our percent yield was our filter not being closed enough when in the funnel. hope this help's :}

Explanation:

"tear down this wall! " is a line from a speech made by u.s. president ronald reagan in west berlin on friday, june 12, 1987, calling for the leader of the soviet union, mikhail gorbachev, to open up the barrier which had divided west and east berlin since 1961.