Which best describes what is required for any sound wave to travel?

empty space

any medium

solid

liquid

Organisms are classified, or grouped into categories, based on similarities in their characteristics and/or evolutionary relationships. the study of how organisms are classified is known as

1. which of the following is correct regarding opiates/opioids: a. they all have a natural component as a starting pointb. they have low addiction possibilitiesc. methadone binds to some of the same receptorsd. a and care correcte. all are correct

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