How many extrinsic eye muscles control each eye in a cow?
O 12
06
O 5
O4

Cows have 4 extrinsic eye muscles that control each eye in a cow. They can look up, down, left, and right, but they can't roll their eyes as you can.

answer; ///(b) it is composed of four protein chains and four heme groups;

looks like the answer is     c     to me!