migratory bird is a bird that travels from one place to another at regular times often over long distances. ... Most native birdspecies (birds naturally occurring in the United States) belong to a protected family and are therefore protected by theMigratory Bird Treaty Act.
There are many different ways to approach; it is the scientist own form of thinking.
Eukaryotic cells have one nucleus inside a membrane.
Prokaryotic do not have a membrane bound nucleus nor <span>mitochondria.
Also, please note the following:
Mitochondria is the powerhouse of the cell
</span>
