Answer: Nick's father was tested for his blood type to determine his blood group and even to see if he is Rh-positive or Rh-negative.
Explanation: Unless he is a universal donor (someone with O+ blood), Nick's father won't be able to give his blood to anyone without knowing his blood type first. Giving someone the wrong blood type can be harmful to the receiver's immune system.
1st answer is the heart the heart often contracts even after removed. 2nd answer is single nucleus ,stained branching cells. 3rd answer is biceps.
Go running
go swimming
working your muscles and ligments
