'When a planarian, one of these, is cut in half, both halves will regrow'
a worm
INVERTEBRATES: When a planarian, one of these, is cut in half, both halves will regrow
When a planarian, one of these, is cut in half, both halves will regrow
When a planarian, one of these, is cut in half, both halves will regrow
INVERTEBRATES
a worm
INVERTEBRATES