This question isn't really finished, but bacterium are unicellular prokaryote.
I hope this helps?.. :S
I have only heard a few phrases for spine
Backbone
Vertebrae (vertebral column)
Spinal column
Spermatogenesis is the process in witch spermatozoa are produced from male primordial germ cells by way of mitosis and meiosis.
Oogenesis is the process by which the female gametes, or ova, are created.
<em>Use a punnet square to solve the problem.</em>
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<u>rg RG Rg rG rg</u>
A) Crossing - over