In most animals, combinations of various tissues make up functional units called
A B C D
epithelial cells. organs. organ systems. populations.
Question: In most animals, combinations of various tissues make up functional units called
(A) epithelial cells.
(B) organs.
(C) organ systems.
(D) populations.

Answer: (B) organs.
Answer: (C) organ systems.
Question: In most animals, combinations of various tissues make up functional units called
(A) epithelial cells.
(B) organs.
(C) organ systems.
(D) populations.
Answer: (B) organs.