In the 1930s, the Navajo Nation treated sheep and cattle for ticks and other parasites by using concrete "dip tanks." Animals were herded through one end of the tank and out the other. Each day, the tanks were filled with 200,000 gallons of insecticide and any remaining chemicals were emptied onto the ground. The pesticide solution seeped into the ground, ditches, and pits around the tanks. This was a common practice in the United States during that period.
Ans: chemoheterotrophs
Biology & Microbiology
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a. A b. B c. C d. D e. E
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The common childhood illness called "hand-foot-and-mouth disease" because it causes lesions in these areas is caused by
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