Answer:
Clogging engine cooling systems - Bra Mussels
Extinction of bandicoots - Feral Cats
Blocking water boats - Water Hyacinths
Hope this helps :)
Internal means its on the inside
external means its on the outside
so an internal regulator is when the proteins respond to events on the inside of a cell
and an external regulator is when the proteins respond to events outside the cell
D. Ability to read
Hope this helped
Some cells have to give up reproduction