Answer:
Keratin serves important structural and protective functions, particularly in the epithelium. Some keratins have also been found to regulate key cellular activities, such as cell growth and protein synthesis
Answer:
phosphates will return to the soils or oceans again during decay
Hope I helped :D
Heartburn is a burning discomfort that is generally felt in the chest just behind the breastbone. The burning sensation is caused when harsh stomach juices come in contact with and irritate the delicate lining of the esophagus.
Earthquakes happen due to tectonic plate motion
The answer is <em>C</em> - <em>Chromosomes. </em>