Word: protozoa
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Professor L. R. Cleveland is more interested in the sex life of smaller animals, minute protozoa that live in the bodies of insects. Usually the amoebae reproduce by splitting in half, but inside insects they find a chemical that changes them into males and females...
That's why the protozoa lives there. By reproducing sexually they get new gene structure in their offspring, and can improve biologically. The whole subject throws light on how sex began...
...game fish are the topmost rung of a long fish-eat-fish biological ladder. At the bottom are one-celled organisms-bacteria, algae, protozoa-which form the prey of slightly larger creatures (tiny crustaceans). These get eaten by the next size creatures-and so on up the line...
Between 1928 and 1930, a Russian scientist named B. Tokin noticed that "a paste prepared from a small amount of macerated onion, garlic or other allied plant immediately emits volatile substances which are lethal to yeast cultures," frogs' eggs, protozoa (one-celled animals which live in water), etc. Two years ago Drs. Toroptsev and Filatova began grinding up fresh onions and garlic to see whether the smell would do any good to infected wounds of rabbits...
...after any treatment is taken, protozoa may hide out in tissues like the liver or spleen, pop up to plague a "cured" man months or years afterwards; and a patient who succeeds in becoming completely free of the parasites has no true immunity, is liable to reinfection if an infected mosquito bites him. And there are always some mosquitoes with malarial stomach ulcers threatening the human race in the tropics...