1. This Week in Biology

2.  All living things depend on each other to survive; nothing can survive alone

3.  Mutualism – win / win relationship  Commensalism – win / neutral relationship  Parasitism – win / lose relationship; the host does NOT die

4.  Competition – Organisms must secure limited resources  Predation – One organism eats another. One dies.

5.  Physical or behavioral trait that helps an organism survive in its environment.

6.  How do the birds adapt to less rain?  To more rain?  Can NEW birdbeak sizes happen? How?  Does the beak of individual beaks grow or shrink? How does adaptation work?