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History of Life
Chapter 14 Test Review
| Question | Answer |
|---|---|
| What radioactive isotope would be used to measure the age of mummified tissue? | Carbon-14 |
| What fossil type provides the most anatomical information to paleontologist? | Amber |
| What is the name of the period that followed extensive glaciations in the precambrian? | Ediacaran |
| Nearly all fossils occur in what kind of rock? | Sedimentary |
| The oldest fossils found were of microfossils and are 3.5 billion years old and found in _____. | Volcanic rock |
| Pasteur's experiments lead to the development of what theory? | Theory of Biogenesis |
| ____ was likely to have provided a framework for amino acid chains | Clay |
| Banded iron formations are important evidence for the early evolution of ___. | Photosynthetic autotrophs |
| What is the approximate age of the earth? | 4.6 billion years |
| Which gas was most likely not part of the earth's early atmosphere? | Oxygen |
| Cells with membrane bound nucleus and organelles | Eukaryotes |
| Cells without membrane bound nucleus and organelles | Prokayotes |
| Earth formed and the first life appeared | Precambrian |
| Energy from sunlight and lightning allowed the first organic molecules to form | Oparin Hypothesis |
| ____ are the first molecules that must for in order to life to exist | Amino acids |
| Mammals first appeared | Mesozoic era |
| Prokaryotic cells were likely involved in the formation of Eukaryotic cells | Endosymbiont theory |
| Scientists hypothesize that the first cells were ____ | Prokaryotic |
| Which era of earth's history could be named the"era of mammals?" | Cenozoic |
| The mass extinction of the dinosaurs happened during the ____ | Mesozoic era |
| Smallest unit of geologic time lasting several million years | Epock |
| Determining the age in relation to the layers of rock surrounding the fossil | Relative dating |
| Determining the age of a fossil by measuring radioactive elements present | Radiometric dating |
| Scientist who studies fossils | Paleontologist |
| Unit of geologic time consisting of two or more periods that last hundreds of millions of years | Era |
| Divisions of geologic time lasting tens of millions of years | Periods |
| Younger rock layers are deposited atop older rock layers | Law of Superposition |
| Amount of time it takes for half of a given sample of radioactive elements to decay | Half-life |
| Remains or evidence of once living organisms | Fossils |
| Theory disproven by Redi | Spontaneous Generation |
| Because of it's ____, earth is a planet that is capable of maintaining an atmosphere | Gravitational field |
| Earliest fossilized life forms are known as ___. | Microfossils |
| The death of all individuals of a species | Extinction |
| Record of earth's history | Geologic time scale |
| Geologic time scale was based on a coordinated project by the ___. | International Commission on Stratigraphy |
| Ancestors of most major animal groups diversified in what scientists called the ____ | Cambrian Explosion |
| Sediment layer in which scientists found large amounts of an element called iridium. | K-T Boundary |
| The dominant organisms during mesozoic era | Dinosaurs |
| Describes the movement of several large plates that make up the surface of the earth. | Plate tectonics |
| Evidence indicates that a sequence of ______ preceded by the origin of life on earth and that life has evolved continuously since that time | Chemical events |
| Pasteur's experiment showed that sterile broth remained free of ____ until exposed to air | Microorganisms |
| The primordial soup hypothesis was proposed by Alexander Oparin and ___ | John Haldane |
| The ____ experiment showed for the first time that organic molecules could be produced from gases proposed to have made up the atmosphere of early earth. | Miller-Urey |
| Scientists who study chemistry and how it relates to life | Biochemists |
| An instrument or process by which something is done or comes into being | Mechanism |
| Archaea near deep-sea hydrothermal vents use ____ to form the base of the vent food web | Inorganic molecules |
| Scientists believe that iron banding in sedimentary rocks is a result of cyclic peaks in ____ production. | Oxygen |
| Biologist who proposed the endosymbiont theory | Lynn Margulis |
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SavannahElkins
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