| The cause of this luminosity is Micrococcus phosphorens, an immotile round, or almost round organism. |
| When one set of contestants comprises a swarm of tiny, highly mobile sperm and the other a few large, immotile eggs, there is a certain inevitability about the outcome. |
| Many of these immotile spermatids are dislodged from the spermatheca and swept away as oocytes parade through the reproductive tract. |
| While many forms are fixed to the substratum, others are free, being in this condition either motile or immotile. |
| And they currently have forty-two ships searching for an immotile civilization beyond the region of space we Firewalled. |
| All these factors can cause not only low counts, zero counts, and immotile sperms that lead to infertility, but also cancers in some cases. |
