PLANTS THAT PREY 
living animals, they found the task more difficult. In the 
first place, they like acid homes, and animals are mostly 
alkali. The insides of animals are not very well venti¬ 
lated and these plants like air. 
The lower the form of animal life the more likely it is 
to be attacked by these tiny plants. Many insects have 
enemies that are very deadly. Man has found this out, 
and often, when an insect becomes a pest, he brings in its 
plant parasite and establishes it. This tiny plant some¬ 
times wipes out the pest. Man himself is fed upon by 
only a few of these plants, but some of them are quite 
deadly. A good many people die every year of bacterial 
and fungus diseases — of plants feeding on their vitals. 
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