The correct answer is the evolution of multicellular life. The evolution of multicellular was the most important event happened during the creation of the ozone layer. All of type of the organisms had evolved over time.
Evolution: Organisms that change throughout time
Natural Selection: Describes how and why the change occurs
Natural selection is the process where the individuals with better traits survive ( in where they are ) while the individuals with less suited traits for that environment dies.
In your case, wouldn't the answer be something among the lines of "The humans with bigger jaws and more teeth found it difficult to eat or find enough food to satisfy their stomachs"? ( It makes sense. Usually, if the animal has bigger features, like mouth, and more teeth, they would need more food or nutrient to grow those bigger features. If one has bigger/more features, then that typically means they are bigger as well, which also means they need a bit more food. ^^ Yes, my logic is a bit weird, but it helps out. )
The cell division process of prokaryotes, called binary fission
Hope this helps! have an amazing day :)
Teaching the process of scientific inquiry might seem different from teaching content-related material in the life or physical sciences.
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