There are two classes of membrane transport proteins—carriers<span> and </span>channels<span>. Both form continuous </span>protein<span> pathways across the lipid bilayer. Whereas transport by </span>carriers<span> can be either active or passive, solute flow through </span>channel proteins<span> is always passive.</span>
The correct answer among all of the given choices would be the third choice, CLOUDS.
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<span>Vascular plants are able to grow higher than other plants due to the rigidity of xylem cells, which support the plant.</span>
Under normal conditions it is not toxic
Adding ammonium nitrate to water turns the mixture cold and is a good example of an endothermic chemical reaction
If carbon dioxide and water were abundantly available to a heterotrophic prokaryotic cell, then it would only take sunlight to proceed with photosynthesis to produce carbohydrates such as glucose and other sugars. <span>prokaryotes were recognized as the first organisms that evolved in Earth.</span>
