Floating or motile ones in the water column have a greater chance of being incorporated into the ice, if water from below fills openings.
The extracted worms were whitish, slender, cylindrical with tapered ends, consistent with nematodes and highly motile.
Separation of motile populations of spermatozoa prior to freezing is beneficial for subsequent fertilization in vitro: a study with various mouse strains.
The percentage of motile spermatozoa and those with intact acrosomes were monitored throughout all experiments.
Thus, the force distribution created by an activated motile flagellum will be affected by fluid viscoelasticity, as will the hydrodynamic power expended.
Of particular interest is the finding that motile cells switch surface morphologies reversibly between ruffles and blebs.
They are actively motile organisms, multiplying usually by longitudinal or multiple division.
Being more motile, the dead cells migrate more readily than the live cells.
