Answer:
In the time scale above you can see that the Phanerozoic is divided into three eras: Cenozoic, Mesozoic and Paleozoic. Very significant events in Earth's history are used to determine the boundaries of the eras. Eras are subdivided into periods
Explanation:
They need both mitosis and meiosis if they produce animal gametes. Mitosis is the division of a cell into two identical cells. Meiosis, on the other hand, is the production of sex cells or gametes (sperm and egg). Both processes are needed by animals to reproduce.
My suggestion is to take plenty of notes and write definitions
Both cells are eukaryotes because they have a nucleus (mitochondria and chloroplasts too) an example of a prokaryotic cell would be a bacteria cell which does not have a nucleus
Earthquakes are mainly known to occur at plate boundaries where plates converge, diverge or slide past each other. Earthquake activity sometimes accompany volcanic eruptions but these too are concentrated around some plate boundaries (convergent, divergent).
Smaller earthquakes are known to occur in intra-plate regions, away from margins. These occur simply because of stresses being built up in rocks. The crust is solid and rigid and it floats on the mantle which is a curved surface like the crust.