The correct answer would be phyla; divisions. ... For example, Acanthocephala, Annelida, Arthropoda, Chordata, et cetera are some phyla used in animal classification. bryophyte, Charophyta, Chlorophyta et cetera are some divisions used in plant classification
Square root of 29 or 5.38516
Answer: "natural selection" .
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The reason why nost scientists thought that the first true cells formed on Earth were anaerobic is being shown in the second option :B. because there was no oxygen on early Earth. Paying attention to this fact scientists discovered that first cells were prokaryotes and greatest part of them created oxygen as a toxic by-product of their own metabolism which make them understand how the planet was provided with oxygen and made a conclusion that first cells were anaerobic.
