Akind of chemical sedimentary rock a. compaction, b. cementation, c. limestone, d coal

What are the subsystem of the earth

Can i get the answer to this problem?

2.) insulin is needed to your cells take in sugar from your blood. after you eat a candy bar, will your insulin gene be expressed or repressed? 3.) all cells have the same dna, and they all make the same proteins. true or false? the answers are 2.) expressed3.) false