1. Which event in Earth’s history was dependent on the development of a certain type of life-form? A) addition of free oxygen to Earth’s atmosphere B) formation of clastic sedimentary rocks C) movement of tectonic plates D) filling of the oceans by precipitation 2. According to fossil evidence, which sequence shows the order in which these four life-forms first appeared on Earth? A) reptiles ® amphibians ® insects ® fish B) insects ® fish ® reptiles ® amphibians C) amphibians ® reptiles ® fish ® insects D) fish ® insects ® amphibians ® reptiles 3. Which group of organisms, some of which were preserved as fossils in early Paleozoic rocks, are still in existence today? A) brachiopods B) eurypterids C) graptolites D) trilobites 4. The primitive lobe-finned fish shown below is thought to be an ancestor of early amphibians. 7. Earth's fossil record shows evidence that A) very few life-forms have become extinct B) life-forms existed on land before life-forms existed in water C) more complex life-forms probably have evolved from less complex life-forms D) older bedrock contains a great variety of lifeforms, while younger bedrock contains less variety of life-forms 8. Which gas is inferred to have been absent from Earth's atmosphere during the Early Archean Era? A) carbon dioxide B) nitrogen C) oxygen D) water vapor 9. Theories of evolution suggest that variations between members of the same species give the species greater probability of A) remaining unchanged B) surviving environmental changes C) becoming fossilized D) becoming extinct 10. The diagram below is a portion of a geologic time line. Letters A through between the labeled events, as estimated by some scientists. This evolutionary development from fish to amphibian is believed to have occurred during the A) Triassic Period B) Devonian Period C) Tertiary Period D) Permian Period 5. The gases in Earth's early atmosphere are inferred to have come primarily from A) meteor showers B) melting of glacial ice C) volcanic eruptions D) evaporation of seawater 6. Much of the evidence for the evolution of lifeforms on Earth has been obtained by A) B) C) D) studying the life spans of present-day animals radioactive dating of metamorphic rock correlating widespread igneous ash deposits examining fossils preserved in the rock record Fossil evidence indicates that the earliest birds developed during which time interval? A) A B) B C) C D) D 11. Which graph best represents human existence on Earth, compared with Earth's entire history? A) C) 16. The diagram below shows a process thought to have produced Earth's early atmosphere. B) D) 12. According to the fossil record, which sequence correctly represents the evolution of life on Earth? A) fish amphibians mammals soft-bodied organisms B) fish soft-bodied organisms mammals Which major component is shown as gas X? amphibians C) soft-bodied organisms amphibians fish A) helium B) ozone mammals C) carbon dioxide D) hydrogen D) soft-bodied organisms fish amphibians 17. Fossils of two trilobite species from different mammals geologic periods are illustrated below. 13. Examination of the fossil record shows a general tendency of organisms to become increasingly more complex through geologic time. This finding supports the theory that living things have undergone A) metamorphism B) evolution C) radioactive decay D) mass extinctions 14. Which life-form appeared first? A) trilobite B) human C) coelophysis D) stromatolite 15. Studies of the fossil record found in Utah indicate that A) variations within a species can be observed, measured, and described B) variations within a species have had little effect upon the survival of the species C) few of the species of plants and animals that existed have become extinct D) there is no evidence for evolutionary development among the different fossil species A comparison of these fossils provides evidence that these species may have A) undergone evolutionary development B) undergone metamorphism C) experienced identical lifespans D) experienced weathering and erosion 18. Trilobite fossils from different time periods show small changes in appearance. These observations suggest that the changes may be the result of A) B) C) D) evolutionary development a variety of geologic processes periods of destruction of the geologic record the gradual disintegration of radioactive substances 19. Base your answer to the following question on the reading passage and the drawing below and on your knowledge of Earth science. Fossil With Signs of Feathers Is Cited as Bird-Dinosaur Link Paleontologists have discovered in China a fossil dinosaur with what are reported to be clear traces of feathers from head to tail, the most persuasive evidence so far, scientists say, that feathers predated the origin of birds and that modern birds are descendants of dinosaurs. Entombed in fine-grained rock, the unusually well-preserved skeleton resembles that of a duck with a reptilian tail, altogether about three feet in length. Its head and tail are edged with the imprint of downy fibers. The rest of the body, except for bare lower legs, shows distinct traces of tufts and filaments that appear to have been primitive feathers. On the backs of its short forelimbs are patterns of what look like modern bird feathers. Other dinosaur remains with what appear to be featherlike traces have been unearthed in recent years, but nothing as complete as this specimen, paleontologists said. Etched in the rock like a filigree decoration surrounding the skeleton are imprints of where the down and feathers appear to have been. The 130-million-year-old fossils were found a year ago by farmers in Liaoning Province in northeastern China. After an analysis by Chinese and American researchers, the fossil animal was identified as a dromaeosaur, a small fast-running dinosaur related to velociraptor. The dinosaurs belonged to a group of two-legged predators known as advanced theropods . . . excerpted from “Fossil With Signs of Feathers Is Cited as Bird-Dinosaur Link” John Noble Wilford New York Times, April 26, 2001 The drawing below shows an artist’s view of the dinosaur, based on the fossilized remains. The reference to the bird-dinosaur link is most likely referring to the concept of A) plate tectonics C) dynamic equilibrium B) evolution D) recycling 20. Which fact provides the best evidence for the scientific theory of the evolutionary development of life on the Earth? 25. Base your answer to the following question on the diagram, which shows the evolutionary development of the horse, as supported by the fossil record. A) Fossils are found almost exclusively in sedimentary rocks. B) Characteristics of simpler forms of life can be found in more complex forms of life. C) Only a small percentage of living things have been preserved as fossils. D) Most species of life on the Earth have become extinct. 21. Earth scientists studied fossils of a certain type of plant. They noted slight differences in the plant throughout geologic time. What inference is best made from this evidence? A) When the environment changed, this type of plant also changed, allowing it to survive. B) When uplifting occurred, the fossils of this type of plant were deformed. C) The processes which form fossils today differ from those of the past. D) The fossils have changed as a result of weathering and erosion. 22. The changes observed in the fossil record from the Precambrian Era to the Cenozoic Era best provide evidence of A) sublimation B) radioactive decay C) evolution D) planetary motion 23. The similarity of some fossil forms from different time periods suggests a gradual transition that may be the result of A) unconformities B) evolutionary development C) folding and faulting D) uplift and erosion 24. Which gas became part of Earth's atmosphere mainly as a result of the evolution of life-forms? A) oxygen C) helium B) nitrogen D) hydrogen Which statement best explains the changing appearance of the horse, as supported by the fossil record? A) The horse evolved due to the influence of humans. B) The horse evolved from a complex life-form to a simpler life-form. C) The horse evolved into a life-form better able to survive. D) The horse evolved from larger ancestors without forelimbs.
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