Small intestine is modified due to the presence of micro villi which has ability to increase it's size
Answer: They compare the number of mutations to determine how long ago species separated and evolved.
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Microtubules are tiny, hollow, bead-like tubular structures that help cells maintain their shape. Along with microfilaments and intermediate filaments, they form the cytoskeleton of the cell, as well as participate in a variety of motor functions for the cell.
C. protein. Nitrogen is a component of amino acids which are the building blocks of protein.
