Urban diseases and causes or mortality are more likely to be those spread by person to person, crowding.
Rounded, Rod-like & Spiral
The carbon lives in the plant or animal and when it dies, nitrogen sinks into the soil which is used as nutrients for plants.
Answer:
during the Cambrian Period of the Paleozoic Era.
Explanation:
The Paleozoic is the earliest era (of three) of the Phanerozoic Eon and is composed of six geologic periods: the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian (in that order from earliest to the latest). Fish first appeared about 530 million years ago during the Cambrian explosion.
