Practice_questions_Exam_2_SS12-1

Practice_questions_Exam_2_SS12-1 - Practice questions BS...

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Practice questions BS 110 Exam 2 SS11 Key at end 1. What is the correct sequence of important Precambrian events? a. first photosynthetic cells, first rocks containing oxygen, first multicellular organisms, first eukaryotic cells b. first rocks containing oxygen, first eukaryotic cells, first photosynthetic cells, first multicellular organisms c. first photosynthetic cells, first rocks containing oxygen, first eukaryotic cells, first multicellular organisms d. first eukaryotic cells, first photosynthetic cells, first rocks containing oxygen, first multicellular organisms 2. The best index fossils for assigning relative ages to different strata are those of a. widespread marine animals with hard parts. b. rare species with long temporal ranges c. soft-bodied invertebrates. d. Bacteria. 3. Why are stromatolites particularly interesting to evolutionary biologists? a. their rapid growth is contributing to global warming b. they are good indicators of global warming. c. some early prokaryotes formed stromatolites much like those forming today. d. they are thought to have been the earliest forms of life to evolve in deep sea vents. e. all the above 4. Choose the correct order of groups that arose during the Paleozoic Era: a. dinosaurs, mammals, birds, flowering plants. b. shelled animals, chordates, insects, reptiles. c. bacteria, Archaea, eukaryotes, multicellular life. d. shelled animals, mammals, amphibians, flowering plants. 5. Why was the colonization of land by plants a prerequisite before animals could survive and diversify in terrestrial environments? a. plants provide food for animals. b. animals need plants as habitat. c. plants create greater habitable surface area. d. all the above 6. Which is true of the evolution of terrestrial vertebrates? a. reptiles evolved from amphibians b. mammals and birds both arose from the same group of reptiles c. amphibians evolved from one group of reptiles d. amphibians gave rise to fishes
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7. During which mass extinctions did 90% of all marine species go extinct? a. Ordovician b. K-T c. Cretaceous d. Permian 8. Which is likely to be the most common fossil overall? 1 a. Fossilized jellyfish 2 b. Fossil sharks from 150 million years ago 3 c. Archaeopteryx 4 d. fossil shells from 20 mya 9. Coal deposits are the remains of a. swamp forests from the Carboniferous Period b. stromatolites from the Precambrian c. early swamp plants from the Silurian d. swamps from the Cretaceous 10. Fill in the chart for 6 half-lives… a. mass = 1/64, # yr = 34,200 b. mass = 1/16, # yr = 28,500 c. mass = 1/32, # yr = 28,500 d. mass = 1/32, # yr = 28,500 11. The Cambrian Explosion was when
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a. massive volcanic explosions caused the end-Cambrian extinction event b. Snowball Earth nearly ended all life c. representatives of most major animal groups with hard parts first appear in the fossil record d. multicellular organisms first appeared in the fossil record 12. Your team sets your time-travel machine to 450 mya. What multicellular organisms
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Practice_questions_Exam_2_SS12-1 - Practice questions BS...

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