(共14张PPT)
Touching on fingerprint formation (P6)
I. Lead in
How do you unlock your phone
Password.
Fingerprint.
Facial recognition.
I. Lead in
Can you unlock other people’s phones with your own fingerprints Why
I. Lead in
What else can we do with our fingerprints
身份识别
open the door
clock in/out
personal identity verification
II. Prediction
Scientists may have figured out how fingerprint patterns are formed.
Read the passage quickly to understand what it is mainly about.
II. Read for general information
What about fingerprints did Denis Headon and his colleagues aim to find
A. The diversity of fingerprint patterns in nature.
B. The genetic factors that influence fingerprint formation.
C. The differences between humans’ and animals’ fingerprints.
D. The link between fingerprint patterns and limb development.
Para 2, line 4
Denis Headon at the University of Edinburgh, UK, and his colleagues started their study from a new perspective: how genes (基因) affect fingerprint patterns. They identified the genes related to limb (肢体) development, which could serve as the groundwork for print formation, according to their work published in 2022.
2. How did the researchers carry out the study
A. By studying human hand anatomy(构造).
B. By growing human cells in mouse toes.
C. By comparing mouse toes with human hands.
D. By experimenting with mouse toes and artificial human cells.
Para 3
However, many genes are not involved in the process. “[The key is] how they are deployed (展开) on the anatomy (构造) of the hand,” Headon told Nature, a science journal. The team studied the ridges (脊) on mouse toes and human cells grown artificially.
3. What does the underlined word “inhibits” in paragraph 4 most probably mean
A. Processes. B. Produces. C. Prevents. D. Promotes.
Para 4
They found two kinds of elements work against each other. A protein called WNT, which is important in skin development, stimulates ridge formation. Another molecule (分子), called BMP, inhibits the ridges. With the two elements “fighting” each other, they create the patterns of waves.
4. What does Sarah Millar think of the study
A. It improves the Turing system.
B. It will reveal how the skin matures.
C. It may inspire more studies on human skin.
D. It explains the mechanism that regulates human skin.
Para 7
Based on the new study, it may be possible that the structures of human skin might be all generated by the same mechanism (机制), Sarah Millar, a US biologist, told the website Science News. However, more studies on how the skin matures are needed to solve the mystery.
1. Compared with previous research, what innovations did these scientists make
2. How do WNT and BMP work to create fingerprint patterns
III. Read for details
Read and answer the following questions.
1. Compared with previous research, what innovations did these scientists make
They focused on how genes affect fingerprint patterns. They identified the genes related to limb development, which could serve as the groundwork for print formation.
2. How do WNT and BMP work to create fingerprint patterns
III. Read for details
WNT stimulates ridge formation, while BMP inhibits the ridges. With their “fighting”, they create the patterns of waves.
1. figure out
2. perspective
3. serve as the groundwork for
4. stimulate
5. inhibit
6. solve the mystery
想出，弄明白
作为......的基础
刺激；激励
4. Language study
抑制，阻止
角度；观点
解开谜团
