A
addition mutationadeition mutation
so its A
Burning fossil fuels releases carbon dioxide and causes global warming
Bivalves are protostomes, as they belong the to phyla Protostomia. They are freshwater/marine molluscs, whose body is covered by a protecting shell. They do not have a head, and some of their examples include oysters, clams, mussels etc.
Desert and steppe regions on Earth cover about 42 million square
kilometers, or about 30 percent of Earth's land surface
