Are all chloroplasts in a tree the same size or does it only change from species to species.?

Answer 1

NO. chloroplasts in a same tree varies in size and they also vary from species to species.

Answer 2

The previous poster was correct: they change size.

Think about it.

Think.

How could it be true that chloroplasts are the same size in a microscopic euglena and a huge leaf, bigger than your palm?

It could not be true, logically--and a simple google search would have told that answer, too.