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6-3 common ancestry
6-3 Common Ancestry
| Question | Answer |
|---|---|
| Where do fossil form? | Sedimentary rock |
| Remains or imprints of once living organisms. | fossils |
| Over time sediments cover dead organisms and ______________ seeps into the organism and replaces the body material. | minerals |
| Fossils that help fill in the gaps of geologic time. | transitional fossils |
| What forms when sand and soil are deposited in horizontal layers and harden? | Sedimentary rock |
| All the fossils that have been discovered make up the_________________. | fossil record |
| When minerals seep into the organism and replace the body materials it will form? | Cast fossil |
| How common is it for a organism to become a fossil? | Rare |
| What information is provided by the fossil record? | 1. Order in which the species existed. 2. how they have changed over time. 3. history of life on earth. |
| A large chunks of geologic time for which a fossil has NOT been discovered. | Gaps |
| What usually happens to organisms when they die that keeps them from becoming fossils? | They are recycled back into the environment by scavengers, decomposers and weathering. |
| Where are the newest layers of rock found. | Top of the ground, near the surface. |
| Where do you find older layers of rock? | In the lower layers of sedimentary rock. |
| Newer fossils found in the upper layers of sediments resemble. | Present day organisms. |
| Where do scientist find evidence that species have changed over time? | Common anatomical structure, similar DNA, developmental similarities, proteins and fossils. |
| What does extant mean? | still exist, or alive |
| Extinct means? | No longer in existance. |
| The science that studies the structure of the body | Anatomy |
| When organisms share a common genetic heritage. | They are ancestors |
| Means "History of life" | Fossil record |
| What is an analogous structure? | similar structures that evolved independently in two living organisms to serve the same purpose |
| When a population changes slowly over time. | evolution |
| A source of variation that can be helpful, harmful or neutral. | Mutation |
| What is the study of past life as rocks or fossils? | Paleontology |
| A fossil that provides evidence of the activities of ancient organisms is a... | Trace fossil |
| If scientists found a fossil of a fish, what could they infer? | Water once covered the area |
Created by:
KHurst24
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