Type of Isolation Pre or Post Example Two species of frogs mate in a laboratory setup and produce viable but sterile offspring. Two species of sea urchins release gametes at the same time, but the sperm fail to fuse with eggs of a different species. The genital openings of two species of land snails cannot line up because their shells spiral in opposite directions. Two species of salamanders mate and produce offspring, but the hybrid’s offspring is sterile. Two similar species of birds have different mating rituals. Embryos of two species of mice bred in the lab usually abort. Peepers breed in woodland ponds; leopard frogs breed in swaps. 4. Differentiate between allopatric speciation and sympatric speciation. Chapter 18: History of the Earth 1. Describe radiometric dating. How does Carbon 14 form in the atmosphere? 2. If the half-life of a radioactive substance is 500 years, what fraction of the original material is left after 1500 years? 3. What types of materials can be dating using radiometric carbon dating? 4. Describe the Earth’s early atmosphere. Where is the oxygen in the atmosphere come from? 5. What are stromatolites? 6. Fossils of lobe-finned fishes, which are ancestors of amphibians, are found in rocks that are at least 380 million years old. Fossils of the oldest amphibian-like vertebrate animals with true legs and lungs are found in rocks approximately 363 million years old. Three samples of rock are available that might contain fossils of a transitional species between lobe0finned fishes and amphibians: one rock sample that is 350 million years old, one that is 370 million years old and one that is 390 million years old. Select the most appropriate sample of rocks in which to search for a transitional species between lobe-finned fishes and amphibians. Justify your selection. Describe two pieces of evidence provided by fossils of a transitional species that would support a hypothesis that amphibians evolved from lobe-finned fish. (think about the body shape and structures in both groups of animals) 7. Evaluate the Urey – Miller experiment. What are the limitations of the experiment? What did we learn from the results of the experiment? What future research / experimentation made the experiment more relevant?
Type of Isolation Pre or Post Example Two species of frogs mate in a laboratory setup and produce viable but sterile offspring. Two species of sea urchins release gametes at the same time, but the sperm fail to fuse with eggs of a different species. The genital openings of two species of land snails cannot line up because their shells spiral in opposite directions. Two species of salamanders mate and produce offspring, but the hybrid’s offspring is sterile. Two similar species of birds have different mating rituals. Embryos of two species of mice bred in the lab usually abort. Peepers breed in woodland ponds; leopard frogs breed in swaps. 4. Differentiate between allopatric speciation and sympatric speciation. Chapter 18: History of the Earth 1. Describe radiometric dating. How does Carbon 14 form in the atmosphere? 2. If the half-life of a radioactive substance is 500 years, what fraction of the original material is left after 1500 years? 3. What types of materials can be dating using radiometric carbon dating? 4. Describe the Earth’s early atmosphere. Where is the oxygen in the atmosphere come from? 5. What are stromatolites? 6. Fossils of lobe-finned fishes, which are ancestors of amphibians, are found in rocks that are at least 380 million years old. Fossils of the oldest amphibian-like vertebrate animals with true legs and lungs are found in rocks approximately 363 million years old. Three samples of rock are available that might contain fossils of a transitional species between lobe0finned fishes and amphibians: one rock sample that is 350 million years old, one that is 370 million years old and one that is 390 million years old. Select the most appropriate sample of rocks in which to search for a transitional species between lobe-finned fishes and amphibians. Justify your selection. Describe two pieces of evidence provided by fossils of a transitional species that would support a hypothesis that amphibians evolved from lobe-finned fish. (think about the body shape and structures in both groups of animals) 7. Evaluate the Urey – Miller experiment. What are the limitations of the experiment? What did we learn from the results of the experiment? What future research / experimentation made the experiment more relevant?
Evolution%20ReviewFall%202017.docx