So I'm walking around my house and saw this can someone pls tell me what it is

What type of lipids are found in all biological membranes?

Describe how a student should adjust the microscope to see the cells on a slide more clearly?

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.