Mmmm yes mmmm yes 7% i believe so
A group of similar (accoding to function) types of cells, when comes together to perform a specific function, then it forms a tissues.
When a group of similarly working tissues come together then they form an organ.
And this relation could be written as
cell > tissue > organ
So, organ is a collection of tissues and tissues are collection of cells.
Polymerase chain reaction to amplify the DNA would be the technique used in the blood lab.
All of the above are correct answers