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10 Cards in this Set
- Front
- Back
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Who first conceived the idea of evolution and described the mechanism by which it occurred? |
Charles Darwin and Alfred Russel Wallace |
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Where was the last island Darwin visited? |
Galapagos Islands |
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What did he notice about several of the animals there? |
Darwin observed species of organisms on different islands that were clearly similar, yet had distinct differences |
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What did he notice about the ground finches that supported the idea of a common ancestor and evolution? |
several species with a unique beak shape |
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How did beak size affect the survival of the ground finches? |
helped the birds acquire a specific type of food. For example, seed-eating finches had stronger, thicker beaks for breaking seeds, and insect-eating finches had spear-like beaks for stabbing their prey. |
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How does natural selection occur? |
Survival of the fittest. More prolific reproduction of animals with favorable traits that survive environmental change. |
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Why did Darwin propose giant tortoises survived better than the normal tortoises on the Galapagos islands? |
Their longer necks could help them reach their food better than those with short necks. |
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What are the two main mechanisms of genetic diversity? |
Mutation and Sexual reproduction |
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What is it called if an inherited trait helps an organism survive? |
Adaptation |
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Are certain traits all considered to be positive? Why or why not? |
No. It depends on the environmental conditions and some traits could hurt the organism |
