Which of the following is true? A
Invertebrates are an entire kingdom of living organisms.
B
More than one phylum of animals are invertebrates.
с
Invertebrates are a single phylum of animals.
D
Invertebrates are also called Chordata.

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.