Diversity and Adaptation in Living Organisms: species

The video tutorial explains biological classification, which helps scientists understand the similarities and differences among living organisms. It defines species as groups of organisms capable of reproducing offspring, using tigers and lions as examples of different species. The video also discusses the vast diversity of species, noting that biologists estimate around 2 million known species, but acknowledge that many, especially insects, remain undiscovered.

Why can't a tiger and a lion produce offspring together?

What do biologists estimate about the number of known species?