What are traces or remains of organisms that lived in the past?

a. adaptions
b. mutations
c. traits
d. fossils

Why should the united state be concerned about air pollution in china?

Why do german shepherds shed so much

Which organelles are labeled d, and what is one feature that distinguishes them from the other labeled organelles chloroplasts the only organelles that produce sugars from sunlight mosomes, only found in animal and bacterial cells centricles only found in animal cells mitochondra, the only energo-generating structures found in cells