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As a science student, you must know D~ (teacher's famous saying)

Reason: Most biological genetic materials are mainly DNA.

Most DNA exists in the nucleus.

But there is still a small part of D ~ ~ in chloroplasts and mitochondria.

Ask me why a small part exists in chloroplasts and mitochondria.

Don't ask why you should remember the conclusion! ! (famous chemical sayings)

I don't know, the experiment proves (ask me what experiment you want to know)—

-and the book says so, D~~

Too many famous teachers have infected us-

-I'm a little wordy. sorry