植物学 TPO51-L1 Maize and Teosinte

TPO51-L1

Maize and Teosinte

Listen to part of a lecture in a botany class.

 



  1. What is the lecture mainly about?
  • A. A research study that compares wild and domesticated plants
  • B. Problems with a commonly held hypothesis about the origin of teosinte
  • C. Reasons why wild plants are usually unsuitable for agriculture
  • D. The process used to identify the ancestor of a modern crop

 

  1. What evidence seemed to indicate that maize and teosinte are not related?
  • A. Young teosinte plants do not physically resemble young maize plants.
  • B. Preliminary DNA evidence indicated that teosinte was related to rice.
  • C. Maize and teosinte usually grow in significantly different climates.
  • D. Maize and teosinte have very different types of kernels.

 

  1. Why does the professor discuss hybrids?
  • A. To explain how a geneticist confirmed that maize was widely grown 9,000 years ago
  • B. To indicate the earliest method used by geneticists to identify plant origins
  • C. To explain a method used to demonstrate a link between two plant species
  • D. To describe how geneticists distinguish between wild plants and domesticated plants

 

  1. What was most researchers’ initial view of George Beadle’s theory about teosinte?
  • A. They accepted it but questioned the evidence cited.
  • B. They rejected it because of conflicting archaeological evidence.
  • C. They questioned it because it implies that ancient farmers were sophisticated plant breeders.
  • D. They questioned it because genetic research was viewed with skepticism at that time.

 

  1. What did Beadle conclude about maize and teosinte?
  • A. Both plants lack particular genes that are common in most domesticated plants.
  • B. Both plants have particular genes that enable them to adapt to varying climates.
  • C. Only a small number of genes are responsible for the differences between the two plants.
  • D. The genetic composition of both plants is very similar to that of rice.

 

  1. According to the professor, why was the discovery of stone tools important?
  • A. It proved that teosinte was simultaneously domesticated in multiple locations.
  • B. It helped to confirm the period in which maize was first domesticated.
  • C. It suggested that maize required farming techniques that were more complex than experts had previously assumed.
  • D. It provided evidence that maize plants were used for more purposes than experts had previously assumed.


答案:
D D C C C B

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