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Embedded in the lipid bilayer are large proteins, many of which transport ions and water-soluble molecules across the membrane. Some proteins in the plasma membrane form open pores, called membrane channels, which allow the free diffusion of ions into and out of the cell.
A federal government is the type of government that combines aspects of both unitary and confederal government. The United States has a federal government.
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Domain Classifying Organisms<span> Kingdom phylum Class Order Family Genus Species </span>Why Do Scientists Classify Organisms<span>? </span>Scientists classify organisms<span> to make them easier to study. Taxonomy is very useful to </span>scientists<span> because once an </span>organisms<span> classified they can already learn a lot about it.</span>