The answer is D. You really have to think about this one :)) I hope you get it right
Microtubules are long,hollow protein cylinder that form a rigid skeleton for the cell golgi apparatus
~Jurgen
- Parent material. Few soils weather directly from the underlying rocks. ...
- Climate. Soils vary, depending on the climate. ...
- Topography. Slope and aspect affect the moisture and temperature of soil. ...
- Biological factors. Plants, animals, micro-organisms, and humans affect soil formation.
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