Reversing any two dimensionswill describe a completely different unit. Using the sameexample stated as 4x8x16 would indicate a unit 4 inches wideand 8 inches high (not 8 inches wide and 4 inches high).
Many water fleas swimming together. The water flea is a microscopic crustacean (around .2-5 mm long) that lives in lakes, ponds, swamps, and streams. The most common kind of water flea is the Daphnia. This little, translucent insect is named for the way it swims.
But perhaps the most impressive example of the water flea's adaptability is its armor. When D. pulex senses chemicals in the water given off by predators such as fish, it starts growing defenses, including long tail spines, a pointy helmet, and tooth-like neck spikes. This adaptability is part of what makes the water flea so intriguing as a research animal, Colbourne said. He and his team sequenced the water flea genome and found that is has at least 30,907 genes â more than any animal examined so far. (Humans have about 23,000 to 25,000 genes.)