When does the "classic" chromosome structure of DNA appear during mitosis?

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

What is the statement plant growth is affected by the color light

What function does the limb sever in each animal? how are the limb bones of the four animals similar? based on these similarities what can be inferred about the evolution of the four animals.