Question

which is a source of adult stem cells?
o bone marrow
o amniotic fluid
o embryos
o gametes

Explanation:

Bone marrow contains adult stem - cells that can differentiate into various blood cell types. Amniotic fluid contains fetal stem - cells, embryos are a source of embryonic stem - cells, and gametes are reproductive cells, not a source of adult stem - cells.

Answer:

bone marrow