Some bat calls appear fainter in the spectrogram, and others appear brighter. What does this signify?

Which experiment would most likely contain experimental bias

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups