There are several circumstances in which you should walk away from an extended warranty on a used car. One is obvious: If the car is still covered by the manufacturer warranty, we strongly caution against buying an extended warranty.
Oscillatoria blue green algae that is motile by gliding. Pediastrum duplex . Possibly Pediastrum duplex Pediastrum boryanum ? Pediastrum sp. are planktonic green algae with flat, plate like cluster of cells with one or two points. They come in many different variations. The colonies usually contain 8 to 32 cells, with examples of 4, 64 or occasionally 128.
Remarkable features of dinoflagellates seem to be the rule rather than the exception. Dinoflagellates may possess ejectile organelles similar to the cnidarian nematocysts. Many have numerous structures near the periphery of their cell interior called trichocysts, features similar to those found in ciliates. red tide, more properly termed a harmful algal bloom, is somewhat of a misnomer since the water rarely turns red but more usually a tint of orange, resulting from the rapid bloom and dense populations (up to 100 million cells/l) of one or more of several species of dinoflagellates (or diatoms).