Which of these is not a characteristic of sponges? lack a backbone

lack a brain

stationary

have a nervous system

Which statement about sound is not true? a. air particles travel with sound waves. b. sound waves cannot travel through a vacuum. c. sound waves exist even if no one hears them. d. air particles vibrate along the path of a sound wave.

Which of the following is not one of the steps in the scientific method a. hypothesize b. summarize c. analyze d. familiarize

The volume of a single vanadium atom is 9.29×10-24 cm3. what is the volume of a vanadium atom in microliters?