This is a question of my last biology test:

Name at least one technological device that would have not been invented without scientific knowledge:
A.Radio
B.Ruler
C.Knife
D.None of the above

I answered D but got a cross for it. So can you please help me to solve what is the correct ans?

Which one of those 4 requires technology to make it?

Sra

Radio uses technology

To determine the correct answer for this question, we need to assess each given option and understand the role of scientific knowledge in the invention or development of each technological device.

A. Radio: The invention of the radio was made possible through scientific knowledge. The development of electromagnetic theory by scientists such as James Clerk Maxwell and the subsequent work of inventors like Guglielmo Marconi led to the invention of practical radio communication.

B. Ruler: The ruler is a simple measuring device that does not rely on specific scientific knowledge for its invention. It is based on the concept of measurement, which is a fundamental concept used in various disciplines including math and science. While scientific knowledge has certainly contributed to the refinement of measurement tools, rulers themselves can be traced back to ancient civilizations.

C. Knife: Similarly, the invention of knives predates recorded history and is not strongly tied to scientific knowledge. The concept of cutting tools is a fundamental human invention that has been present throughout human history.

Based on this analysis, the correct answer would be:

A. Radio

Scientific knowledge played a significant role in the development and invention of the radio, making it a technological device that would not have been invented without such knowledge. Therefore, option A is the correct answer.

It's important to note that when answering questions like these on tests, it's always a good idea to carefully read and analyze each option before making a decision. This helps to ensure that you consider all relevant information and choose the most accurate answer.