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.
It should be 2, but I'm not exactly sure
Answer:
I think it isB
Explanation:
Because blood cells have genes than skin cells
For the 3rd one I think E
