Why herbivores need to digest cellulose

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

*will mark brainliest to the first and correct answer less species diversity results in less a. oxygen b. food c. drinkable water d. all of the above

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?