Answer:
Amoeba is a unicellular organism
Answer:
A. Hydrogen atoms are split in fission.
Explanation:
The sun is powered by fission
After the Cretaceous–Paleogene extinction event wiped out the non-avian dinosaurs (birds being the only surviving dinosaurs) and several mammalian groups, placental and marsupial mammals diversified into many new forms and ecological niches throughout the Paleogene and Neogene, by the end of which all modern orders had appeared.
