There are four geographic modes of speciation in nature, based on the extent to which speciating populations are isolated from one another: allopatric, peripatric, parapatric, and sympatric. Speciation may also be induced artificially, through animal husbandry, agriculture, or laboratory experiments.
Post 2. @Anon91339: A ricer is also a legitimate kitchen tool. You can find references to ricers online, or in any culinary dictionary. My mother used to use a ricer to squeeze pulp from seeds when making plum jam.There are photos online. Ricers as kitchen tools predate automobile Ricers and probably the automobile itself.ost 2. @Anon91339: A ricer is also a legitimate kitchen tool. You can find references to ricers online, or in any culinary dictionary. My mother used to use a ricer to squeeze pulp from seeds when making plum jam.
The benefit to using a potato ricer instead of mashing the potatoes by hand is that the potato ricer achieves a uniformly smooth consistency with no lumps. And an electric mixer or food processor can overwork the starches, producing a gluey product. potato ricer (here's one) is shaped like a cup or cylinder with small rice-sized perforations at one end and some sort of handle or press for forcing the food through the perforations.