Micro Organisms
Which of the following may account for the small size of the cells?

The surface area/volume ratio
The number of mRNAs that can be produced by the nucleus
The rate of diffusion
All of these

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Micro Organisms
Eukaryotic cell organelles first emerged

when prokaryotes engulfed each other and became interdependent
when bacteria made their first attempts at reproduction
just before the origin of the animal and fungal kingdoms
from a specialized lineage of cells within the kingdom Protista

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