A group of cells having a common (A)____ and usually performing a common functin, called (B)____

A group of cells having a common (A)____ and usually performing a common functin, called (B)____
A group of cells having a common (A)____ and usually performing a common functin, called (B)____
A group of cells having a common (A)____ and usually performing a common functin, called (B)____
A group of cells having a common (A)____ and usually performing a common functin, called (B)____

(B)____