Chapter 5 Study Guide
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Created by:
hcps-courtneln on May 1, 2011
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Test Monday,May 2
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19 terms
Terms | Definitions |
|---|---|
 Darwin thought that species gradually change over many generations as they become better adapted to new conditions. This process is called___ | Evolution |
| What does evolution occur through? | Natural Selection |
| Only traits controlled by____ can change over time as a result of natural selection. | Genes |
| What did Darwin observe about the finches in the Galapagos Island? | Their beaks were adapted to the foods they ate. |
| A gradual change in a species over time is called | Evolution |
| A trait that helps an organism survive and reproduce in called an | Adaptation |
| What term refers to the process by which individuals that are better adapted to their enviornment are more likely to survive and reproduce? | Natural Selection |
| What term refers to a s[eciescreationg more offspring that can possibly survive? | Overproduction |
| Diffrences within the same speices are called | Variations |
| The process by which twp members of the same species contribute genetic material to the offspring is known as | Sexual Reproduction |
| How does natural selection lead to evolution? | Helpful traits accumulate among surviving members of the species. |
| In polar bears, all bears havve a dark coat. One bear is born with a whtie coat. What is this term called? | Mutation |
| How do most fossils form? | An organism dies and their body becomes buried in sediment |
| State 3 types of evidence form modern day organisms that scientists ise to determine evolutionary relatoinships among groups. | Body Structure, Development Before Birth, DNA Sequences |
| Why do scientists think species have similar body structures and deevelopment patterns? | They may have a common ancestor in their past, This change is seen in the branching tree. |
| Explain how a group or organisms that is seperated from the rest of it species can evolve different traits. | It evolves by better adapting to its enviornment. (Mutating, Surviving, Reproducing) |
| What information does a Branching Tree show us? | It shows how species evolve as well as which animal it evolved form. It also shows how their related. |
| What are homologous structures? | They are similar body structures tha related species have inherited from a common ancestor. |
| Give an example of a homologous structure. | Seal Flipper/Bird Wing |
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