What is an important freshwater ecosystem with a high biodiversity that is also declining in numbers?
a. tides
b. estuaries
c. wetlands
d. reefs

Up until 1938, paleontologists accepted the idea that coelacanths (an ancient fish) went extinct at the time that they last appear in the fossil record, about 80 million years ago. but in 1938, a live coelacanth was discovered off the coast of south africa that was compared to the fossil record and found to be the same species what goal of science does this discovery represent

Acommon kind of mechanical weathering is called

Due tonight 10 points will mark brain