The weed known as Mile-a-Minute is now growing in the area. This vine is physically damaging the shrubs by growing over them. These weeds are also blocking the sunlight for the shrubs. The shrubs are beginning to
die. Identify one biotic factor and one abiotic factor that are causing the shrubs to die. Predict what effect this
will have on insects living on the shrub and birds that eat the weed in the ecosystem.

Where did the term “iron curtain” originate? the warsaw pact used the term iron curtain as a code word for communism. in a 1946 speech, british prime minister winston churchill said an iron curtain had fallen across the continent of europe. while visiting western europe in 1946, u. s. president harry truman commented that the mountains there looked like iron curtains. russian general secretary joseph stalin instructed citizens of eastern europe to hang iron curtains over their windows to protect themselves from stray bullets.