The Burgess Shale preserves a remarkable fossil record of: a. marine life during initial diversification of animals in the Cambrian Period, 505 million years ago. b. the tracks of dinosaurs walking on land. delicate flowers and mushrooms from the early invasion of land plants. c. molecular evidence of bacteria and other organisms. d. plants, insects, and mammals around 50 million years ago, when the age of mammals began.

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

Which best describes a benefit of using dna technology in medicine? a) medicine can be produced in mass quantities. b) medicine can be distributed at a reduced cost. c) medicines have fewer side effects. d) medicines are resistant to antibiotics.

Is a fossil fem that support wegener's hypothesis of continental drift a. gondwanded b. kannemerid c. mesosaurus d. glossopters