The word Prothali is misspelled against Prothalli, which is plural of "Prothallus"
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Prothalli has double "ll" is mispronounced as "l"
Remember double 'LL' in between the strings protha & i which should not be misspelled with single 'L'
Wrong Spelling: protha-l-i
Correct Spelling: protha-ll-i
Find more incorrect spellings of Prothalli to spell right way.