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| Arthropods
Arthropods are a highly-successful group of invertebrate animals that includes centipedes, millipedes, spiders, mites, horseshoe crabs, scorpions, insects and crustaceans.
| Myriapods
Myriapods are a group of arthropods that includes millipedes, centipedes, pauropods, and symphylans. There are about 15,000 species of myriapods alive today.
| The Biomes of the World
Biomes are large regions of the earth that share similar characteristics such as climate, soils, precipitation, plant communities, and animal species. Biomes are sometimes referred to as ecosystems or ecoregions. Climate is perhaps the most important factor that defines the nature of any biome but it is not the only one—other factors that determine the character and distribution of biomes include topography, latitude, humidity, precipitation, and elevation.
| Aquatic Biome
The aquatic biome includes the habitats around the world that are dominated by water—from tropical reefs, to brackish mangroves, to Arctic lakes. The aquatic biome is the largest of all the world's biomes—it occupies about 75 percent of the Earth's surface area. The aquatic biome provides a vast array of habitats that, in turn, support a staggering diversity of species.
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