Agaricus campestris, known as the meadow mushroom or pink-bottom mushroom, are displayed in Saginaw Township, Mich., Wednesday, Nov. 14, 2007. The gills are pink when the mushrooms are young.

Station 1 – Mushrooms

Station 1 – Mushroom Cross Section

Station 1 – Mushroom Cross Section

Station 2 – Bread Mold

Station 2 – Bread Mold

Station 2 – Bread Mold

Powdery mildew (mold) hyphae and spores growing on ragweed pollen (Ambrosia psilostachya). Ragweed pollen is an allergen and molds often produce allergic reactions. Fungal spores are being produced at the ends of the fungal hyphae.

Station 3 – Fungal Spores

Station 3 – Fungal Spores

Station 3 – Fungal Spores

Lichens are attached to a Civil War era stone wall in Storrs, Conn., Tuesday, July 17, 2007. Many of New England's iconic stone walls, captured for generations on calendars and postcards, are disappearing stone by stone because of theft or good old-fashioned capitalism. Now, a growing number of communities and conservation groups are trying to preserve the walls. (AP Photo/Jessica Hill)

Station 4 - Lichens

Bright yellow lichen grows on a dead tree trunk at the Trice-Dedman woods near Plattsburg, Mo., June 28, 1996. Lichen is often the first sign of growth after a tree dies. The woods, owned by the Nature Conservancy, offers nature enthusiasts the opportunity to view about 200 native plant species. (AP Photo/Cliff Schiappa)

Station 4 - Lichens

Microscopic Viewof Lichen

Caption: Budding yeast cell. Computer artwork of a section through a yeast (Candida albicans) cell that is reproducing asexually. A daughter cell (top left) is budding from the parent cell. A mitochondrion (red) and other cellular components are moving into the daughter cell along cytoskeletal filaments (yellow). Mitochondria produce the cell's energy, while the cytoskeleton gives it its shape. The nucleus (purple) contains the cell's genetic information. Inside the nucleus is the nucleolus (round), which synthesises ribosomal ribonucleic acid (RNA). The outer surface of the cell wall is covered with fimbriae, which attach the cell to other cells and aid movement. C. albicans causes the disease thrush.

Station 5 – Budding Yeast Cells

Station 5 – Budding Yeast Cells

Station 5 – Budding Yeast Cells