Endosymbiotic incorporation of a preexisting bacterium attempts to explain the presence of and in the eukaryotic cell.

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

d) center of the mid-ocean ridge

give brainleysest

sinserly,

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