How many species are there in the world?

Does mitochondria still meet the definition of a eukaryote why or why not?

Looking at this image, what relationship can be drawn from it? the lower the degree of latitude, the lower the degree of temperature there is no relationship between latitude and temperature the higher the degree of latitude, the higher the degree of temperature the lower the degree of latitude, the higher the degree of temperature

What best explains the inability for life to exist in earth early atmosphere