Mutations are relatively uncommon because a. frameshift mutations occur very frequently. b. dna is able to repair itself over time. c. physical mutagens such as x-rays seldom damage dna. d. dna repair enzymes often repair errors. e. transposons are constantly moving throughout the genome.

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