Midterm 1 Study Guide PLB

Midterm 1 Study Guide PLB - Midterm 1 Study Guide Please...

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Midterm 1 Study Guide Please note that information for each question may come not only from the Lecture under which each question is listed but from the others as well. It is up to you to compose an answer that contains the relevant information regardless of the lecture but also is illustrated with examples. The examples come from the lectures and the Crop of the Day demonstrations, or your own information! Lecture 1 Questions: 1) List three reasons why we study the domestication of crop plants and describe in detail the importance of each. Agricultural revolution: introduction of a technology that represents a quantum change for humans-anthropology, archaeology. Humans went from hunter and gatherers to farmers during this revolution. The revolution helped pave the way for human civilization. We could mass produce food and feed more people to meet the increasing population demands. Because we had farmers now other people had time to specialize in other trades. There was a constant supply of food now and people didn’t need to move around chasing animals. There was more stability now that they didn’t need to constantly have to move. Now that they had more knowledge of plants they could put them to medical use. People were now domesticating plants and figuring out different uses of plants. Evolution: experimental system - population genetics, molecular evolution, developmental genetics, coevolution. Mutation selection migration drift. Domestication is an evolutionary process. With evolution humans were able to domesticate plants by selecting for certain trait. Same evolutionary processes as natural evolution: mutation, selection, drift, migration. Leads to a very different type of plant: fully domesticated = unable to survive in the wild without human intervention. Crop adapts to a human environment: cultivation, consumption. Cultivation is a necessary, but not sufficient, condition for domestication. Artificial selection for novel traits like size color shape etc. With evolution humans were able to domesticate plants by selecting for certain traits. There was a large range of uses and there were multiple uses per plant. With evolution we could determine the origin of agriculture by figuring out the location of transition and the number of transitions. By studying evolution we can figure out which plants evolved to look alike through convergent evolution and which ones shared a common ancestor. Application of crop improvement i.e. the Development of new crop varieties. Plant germplasm conservation and plant breeding. We can use plant germplasm conservation to bring forth new varieties by using plant diversity. They can possibly be resistant to pests, environmental stress, and disease. It is important to study germplasm because if the plants weren’t resistant to all those things than they would die which in turn would be harmful to humans because we depend on agriculture for food. Plant breeding introduces diversity into agriculture and it allows us to improve crops. 2) List three types of evidence regarding the origin of crop plants and describe the specific
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This note was uploaded on 10/17/2011 for the course PLB 143 taught by Professor Gepts during the Spring '07 term at UC Davis.

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Midterm 1 Study Guide PLB - Midterm 1 Study Guide Please...

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