DNA is used for replication in cells, the replication is called Semi conservative. Tis is when two strand of DNA are used as a code for a new DNA molecule.
What exactly are you trying to ask ??
The correct answer is B. Traction.
Traction is the force that generates movement of objects that have a desire to remain immovable.
Answer:
pericardium is outer covering layer of heart. pericardium is double layered membrane.
Explanation: