BIG IDEAS

This Week in Biology

INTERDEPENDENCEAll living things depend on each other to survive; nothing can survive alone

SYMBIOSIS Mutualism – win / win relationship

Commensalism – win / neutral relationship

Parasitism – win / lose relationship; the host does NOT die

OTHER INTERACTIONSCompetition – Organisms must secure limited resources

Predation – One organism eats another. One dies.

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

BIRDBEAK GIZMO 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?