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spec: Students perform in three theatres , a multi-media room , recital hall , and major auditorium , mounting over 400 performances annually . When the large animals ( or " megafauna " ) in an area are wiped out by sudden change , such as the appearance of humans in N America a few thousand years ago , their " niche " or place in the ecosystem is left empty , and smaller species may begin to evolve to fill it . What are the communicative goals of facial expressions ? Ecthyma is a deeper , ulcerated impetigo infection , often occurring with lymphadenitis . Anna Griswold ’ s presentation about federal student aid programs has set the stage for a brief discussion of the Higher Education Act which is administered by the U.S. Department of Education and scheduled for reauthorization in 2004 . At the same time , the air component mounted a major humanitarian relief effort and delivered nearly all materiel to surrounding bases by air . Nesting normally begins in early to late April , with a peak in May . Retaliation against any person who files a complaint of discrimination , participates in an investigation , or reasonably opposes a discriminatory employment or educational practice or policy is prohibited under University policy , and by state and federal law . The mallard is the most common duck in North America . Caution : Purple pampas grass , C. jubata , is invasive .