Non Unit 01 Evas really made from Adam?

If they are made from then:
- How do they look so similar to the Lilith one
- How does the mother diffusion not cause an impact?
- Wouldnt they need to wake up adam again to produce them? (they had to wake up Lilith to produce 01)
(btw was it actually confirmed somewhere that non 01 units are from adam in the anime?)