Answer:
Mitochondria and chloroplasts
Explanation:
Mitochondria and chloroplasts each have their own DNA due to at one point being prokaryotes that fused with other prokaryotes.
Boundary between two air masses of different temperatures and/or humidity levels
<span>The bone and soft tissues that surround and support the teeth are known as the periodontium.
</span>
The earth's crust varies in many places. in some areas, there are different variations of high elevation (such as ocean trenches), and low elevation (such as volcanoes ie. hawaii)