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Wind blows finer particles long distances from glacial environments, where they settle out to form <u>firn</u>. Firn is a type of snow which is located on the upper part of a glacier that has not turned into ice.
Both chordates and invertebrates have pharyngeal pouches
The nutrients get to the cells in a flatworms solid acoelomate body by diffusion process. Flatworms feed primarily on protozoa and bacteria, smaller worms and tiny organisms, dead or alive, that they come across. Based on the species of the flatworms , they also consume plant materials. They rely on diffusion to transport oxygen and nutrients to their internal tissues.
