Critical concentration is: a. the concentration of tubulin dimers at which assembly is balanced with disassembly.
Explanation:
The cytoskeleton is a complex network of interconnected filaments and tubules that extends throughout the cytosol, from the nucleus to the inner surface of the plasma membrane. Tubulin may assemble and disassemble simultaneously in a process known as treadmilling. In this process, critical concentracion <em>is the concentration of G-actin (actin) or the alpha,beta- tubulin complex (microtubules) at which assembly is balanced with disassembly.</em>
The advantage of sexual reproduction over asexual reproduction is the greater genetic diversity.
B.
Asexual reproduction makes offspring that are identical to the parent while sexual reproduction creates offspring that are unique because two parents contribute their genetics.