Which are functions of small RNAs? Select all that apply.

to act as binding sites for proteins that either promote or inhibit transcription
to cause a protein complex to break down mRNA molecules
to prevent mRNA molecules from being translated
to alter mRNA before it leaves the nucleus

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.