Answer:
im pretty sure its breathing
Explanation:
Generally, epithelial cells serve the function of protection of the inner layers of the structure they are on. The fact that these columbar epithelium and transitional epithelium cells have smooth walls and are dome shaped allows them to stretch. This stretching helps the bladder retain more urine than it would be able to if the epithelial cells were rigid.
This is going to be false. There were mammals that had some characteristics of dinosaurs, such as sharp teeth.
The Endosymbiotic theory was found in the Mitochondria as well as the Cloroplasts.
Here is the answer that you are looking for:
External Regulators<span>. </span>External regulators<span> are also </span>proteins<span>, but they react to stimuli from outside the cell. They direct cells to either speed or slow the cell cycle based upon outside conditions. For example, one </span>protein<span> reacts to molecules on the outside of a neighboring cell.
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I hope this helps out for you
