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15. Thucydides is known as the father of _________________.

16. Researchers think that Ötzi the Iceman may have been infected with _____ disease.

17. The process by which microbes turn grape juice into wine is called _______________.

18. In binomial nomenclature, an organism’s scientific name includes its ________ and __________.

19. Haeckel proposed adding the kingdoms ________ and ________ to his phylogenetic tree.

20. __________ are organisms without membrane-bound nuclei.

21. ______ are microorganisms that are not included in phylogenetic trees because they are acellular.

22. A ________ is a disease-causing microorganism.
23. Multicellular parasitic worms studied by microbiologists are called ___________.

24. The study of viruses is ___________.

25. The cells of prokaryotic organisms lack a _______.