The answer is the letter B. Electrical signals.
*Our brain and body communicates with each other by sending messages in the form of electrical signals.
Answer: D
Explanation: Because new dog breeds are made when people mix two different breeds together to make another breed
The type of microscope that <span>can produce three-dimensional images of a cell’s surface is the electron-scanning microscope. In this type, beam of high-energy electrons is focused to project the correct projection of the cells. The projection of the cells are made up of signals of the surface.</span>
I'm thinking either the first or second answer. Sorry if this doesn't help.<span />
