16Hit1600
Expression of IdeasHardConcluding with a practical application

Expression of Ideas practice question

While researching a topic, a student has taken the following notes: - A gecko's toes are covered in millions of microscopic hairs. - The hairs cling to surfaces through weak molecular forces. - Together the hairs can hold the gecko's weight on smooth glass. - Engineers have made a gecko-inspired adhesive tape that sticks without any glue.

The student wants to conclude the text by identifying a practical application of the research. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  1. A. Engineers have copied the gecko's toe hairs to make an adhesive tape that sticks without glue.Correct
  2. B. A gecko's toes are covered in millions of microscopic hairs.
  3. C. Geckos can hold their own weight on smooth glass.
  4. D. Gecko-inspired tape relies on a powerful glue.

Answer: A. Engineers have copied the gecko's toe hairs to make an adhesive tape that sticks without glue.

The tape is the application; choice A names it and ties it to the gecko.

Why the other answers are wrong

B. A gecko's toes are covered in millions of microscopic hairs.
A fact about the gecko, not an application.
C. Geckos can hold their own weight on smooth glass.
What the gecko can do, not what people have made from it.
D. Gecko-inspired tape relies on a powerful glue.
The notes say the tape sticks WITHOUT glue.

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