<span>A) Archaea and Cyanobacteria is you answer im prity sure</span>
Biology answers many questions<span>, </span>but its main focus is<span> how living organisms interact and function.
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Microtubules originate on the centre of the cell taking the positive end to the periphery of the cell, while the negative end remains turned to the centre of the cell. The melanosomes move along these microtubules using motor proteins desiganted kinesins and dyneins. The kinesins are responsible for moving the melanosomes to the positive end of the microtubule (periphery of the cell) generating dark-colored cells, whereas dyneins move the melanosomes to the negative end of the microtubule (centre of the cell) generating light-colored cells.
All the branches of science that deal with the scientific study of living organism are called life sciences. e.g; botany,zoology,anatomy,biochemistry,embryology etc..
The centrioles are the barrel shaped microtubules that organize the spindles during cell division.
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