What is each step in the food chain called?

The response is the basis for vaccination. primary secondary tertiary none of the above

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.

What type of plant is good for a bioassay and where can i buy it? i only have a month.