The wet smear is extremely useful in the diagnosis of BV. The presence of clue cells, which are epithelial cells with adherent coccobacillary organisms, is pathognomonic for BV (Figure 3). Clue cells have irregular borders and their cytoplasm is full of bacteria, giving these cells a granular appearance.
Deciduous Forest: Plants Trees of this biome include both broadleaf, deciduous trees, such as maple, oak, hickory, and beech, and evergreens, such as hemlock, spruce, and fir. A deciduous forest typically has three to four, and sometimes five, layers of plant growth.
Temperate Deciduous Forests Through Time. As we have said, in a typical temperate forest, tall trees create a thick canopy that blocks most of the sunlight from penetrating. This creates a layer of shade-tolerant herbs and shrubs in the understory. But what happens when the trees fall down? What if a fire burns hot enough to turn everything into ash?