this mostly happens with multi-cellular organisms and red blood cells. Red blood cells lose their nucleus.
true
Cells in some animals that allows for the animal to change its physical form at will.
They are cells that cannot be changed, usually because they have important values that the creator of the spreadsheet does not want anyone to change. Cells can be locked in such a way that only some people can change them, if they have a password. Other cells can be left open to change by anyone.
At some time during their lives, all cells must contain DNA.
This would be normal. All body cells have the same DNA, including blood cells, at least at some point during their life cycles. Mature red blood cells do not contain DNA because they do not have cell nuclei. But when red blood cells are first formed, they do have a nucleus with DNA identical to the rest of the body cells.
They don't. Some grow and divide all the time (skin cells) and some never do (nerve cells) and some only at times when needed.
Some things that are constant in life include change, challenges, and the need for adaptation.
If you're not happy with some of the aspects of your life. Change it. Feel happy.
All living things are organisms. There is no such thing as a living cell that is not an organism.
some of the dead cells of the disease you are being vaccinated from
life changes some
The two factors the affect how and when cells differenitate occurs when certain sections of DNA are turned off. The active DNA then guides how the cell develops and some cells differentiate completely during development. Others do not change until later on in the life of the organism.