TOEFL TPO -1 Speaking Task 3 Sample: Explain how the example from the professors lecture ilustrates the concept of a photoperiodic response.

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Older TOEFL Format

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Task Overview

Reading Passage

Photoperiodic Response Plants undergo various processes related to growth and survival, and these processes may be infuenced by factors in the environment. One such factor is the number of hours of daylight a plant is ex- posed to, and a change in this number can initiate an important internal process within certain plants. This initiation of an internal process is called photoperiodic response. A photoperiodic response generally occurs when a plant senses that the number of daylight hours is increasing or decreasing and has passed a threshold or critical point. The resulting process often helps plant survive an upcoming change in its environment.

Question

Explain how the example from the professors lecture ilustrates the concept of a photoperiodic response.

User Samples & Evaluation Results

Evaluation Result

1.子项得分 Delivery: 3 Language Use: 3 Topic Development: 3

2.预估分数

23. 3.表达

从表达方面来看，这位同学的回答整体上比较清晰，但在某些地方存在一些不太流畅的现象。建议同学在练习口语时，注意保持语速的稳定和减少不必要的停顿。此外，尽量避免发音不准确导致的拼写错误。加强发音练习，提高口语表达能力。

4.话题发展从话题发展方面来看，同学的回答基本上涵盖了阅读和听力材料中的关键信息，并且对概念进行了解释。但是，在组织结构和连接思路方面还有待加强。建议同学在练习时，注意将阅读和听力材料中的关键信息进行更紧密的联系，并尝试使用更多的连接词来使回答更加连贯。通过多做练习，提高话题发展能力。

5.语言使用

Original Answer: ~~amount of daylight the plants exposed to change.~~ The amount of daylight to which plants are exposed changes. (将句子改为完整的陈述句，使用正确的介词和时态。) ~~It will initiate internal change in the plants.~~ This will initiate an internal change within the plants. (使用更自然的表达方式，并添加定冠词。) The professor uses an example to explain the concept. When the day is long in summer, there is ~~normal amount~~ a normal amount (添加定冠词。) of water in the tree. They are well hydrated. But when the day gets shorter, the darkness is increasing. The plants will sense the shift and dry out their water in their bodies. It will contain less water. Because when the temperature gets colder, the water in them will freeze, which is a damage to them. So to avoid the phenomenon, it's probably better to keep the plants water.

Revised Answer (140 words): The amount of daylight to which plants are exposed changes, initiating an internal change within the plants. The professor illustrates this concept with an example of trees in temperate climates. During long summer days, trees have a normal amount of water and are well-hydrated. However, as days get shorter and darkness increases, trees sense this shift and begin to dehydrate their cells, reducing their water content. This adaptation is crucial for their survival because when temperatures drop during winter months, any remaining water in their cells could freeze, causing significant damage. By dehydrating their cells and reducing water content, trees can effectively avoid this potential harm and successfully endure the cold winter months.

6.思维导图


- Photoperiodic Response
  - Internal change
    - Initiated by daylight changes
  - Example: Trees in temperate climates
    - Summer
      - Long days, well-hydrated
    - Winter
      - Shorter days, darkness increases
      - Trees sense shift
        - Dehydrate cells
          - Reduce water content
          - Prevent freezing damage

7.关键词

Word	Phonetic Symbols	Parts of Speech	English definitions	Simplified Chinese translations	Sample sentences
Photoperiodic	/ˌfoʊtoʊpɪriˈɒdɪk/	adjective	Relating to the response of an organism to the relative lengths of daylight and darkness	光周期的	The photoperiodic response in plants helps them adapt to changes in their environment.
Dehydrate	/diːˈhaɪdreɪt/	verb	To remove water from something, especially a person's or an animal's body	脱水	Trees dehydrate their cells to reduce water content and prevent freezing damage during winter months.
Temperate climate	/ˈtɛm.pər.ət ˈklaɪ.mət/	noun	A climate characterized by moderate temperatures and rainfall	温带气候	In a temperate climate, trees undergo a photoperiodic response to adapt to seasonal changes.
Threshold	/ˈθreʃhoʊld/	noun	The level or point at which something begins or changes	阈值	When daylight hours pass a certain threshold, plants initiate an internal process to adapt to the upcoming environmental change.
Adaptation	/ˌædæpˈteɪʃən/	noun	A change in an organism's structure or habits that allows it to adjust to its environment	适应	Dehydrating their cells is an adaptation that trees undergo to survive the cold winter months and avoid freezing damage.