Technician A says that self-etching primer contains acid. Technician B says that self-etching primer is applied to bare plastic.

Who is right?

The approach that contends psychology must study internal mental events in order to fully understand behavior is:

10. in 2009, roughly of people age 12 or older who did not drink alcohol were current users of illegal drugs. a. 4% b. 10% c. 13% d. 20%

Ahummingbird travels from plant to plant to feed itself. which of the following ecosystem services does this hummingbird most likely provide? i. pollination ii. seed dispersal iii. soil preservation i only ii only iii only i and ii only ii and iii only