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There are two incomplete wor...

There are two incomplete words. Place three (3) letters in bracket so that you can complete the word on the left and begin the word on the right.

Correct answers: 30

The first user who solved this task is Djordje Timotijevic.

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On the Farm

Two cows are standing next to each other in a field. Daisy says to Dolly, "I was artificially inseminated this morning."
"I don't believe you," says Dolly.
"It's true, no bull!" exclaims Daisy.

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Sergey Nikolayevich Winogradsky

Born 1 Sep 1856; died 25 Feb 1953 at age 96.Russian microbiologist who helped to establish bacteriology as a major biological science. He was first to isolate the bacteria responsible for nitrification and nitrogen fixation by soil bacteria (1890).Winogradsky also studied bacteria that recycle other vital elements for use by other organisms - including ‘iron bacteria', and those which metabolize sulfur (1887-9) - deriving metabolic energy from inorganic nutrients. Previously, only organic substrates were considered suitable for microbes. The "Winogradsky column" is still used as an enrichment culture that simulates the muddy habitat of anoxygenic photosynthetic bacteria.[Name also spelled Sergei or Sergius.]

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