I believe the miRNAs control gene expression by binding to mRNAs and degrading them or blocking their translation. The microRNAs are short non coding RNAs which function to regulate the process of gene expression. They bind to the 3-UTR of the target mRNAs and repress the production of protein by destabilizing the mRNA and translational silencing.
Founding population arrives, biogeographic isolation occurs, genetic changes
After wind erosion, the igneous rock turns to sediment. It may be dropped into a river where the sediments go through cementation and compaction. Then it become a sedimentary rock. This cycle goes on forever. It is called the rock cycle.
'The Fetus' would be the correct answer.
