If you teach your dog a trick and then reward him with a treat when he performs the trick, this is an example of learned behavior. Over time, the dog learned that he would be rewarded for following your command.
meisos
pollination
Eurkoyotes
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A pathogen = a virus.
An organism, macro or micro, is alive, but viruses cannot technically be considered 'living.'
Thus, non-pathogenic means 'not a virus'.
plant roots