What of the following happens first? A) Introns are edited out of premature RNA
B) RNA polymerase reaches a terminator region
C) Nucleotides are covalently linked together
D) RNA polymerase binds to a promoter region of DNA

The steps in the formation of extrusive igneous rocks are listed below in an incorrect order: 1. rock melts due to high temperature. 2. rock is buried deep under earth's surface. 3. magma is forced out of earth's surface during volcanic eruption. 4. lava cools and crystallizes to igneous rock. which of these best shows the correct order of steps in the formation of extrusive igneous rocks? 1, 3, 4, 2 2, 1, 3, 4 3, 4, 2, 1 4, 2, 1, 3