Explanation:
There's a simple reason why Japanese people can't pronounce R and L correctly. They don't exist in Japanese.
Hope this helps :)
They're considered to be human like hands. They have a thumb like humans which allows them to grip onto trees and maneuver better. It also helps them with their grip onto branches and trees because they rarely come down from up there, so they need to be able to grip tightly even a sleep. I would say it's natural selection due to evolution.
Answer:
hitchhiker effect
it is an exaptation
Explanation:
Adaptation is a property which occurs due to change in the environmental conditions of an organism. Some traits of organisms are not adaptation because sometimes the function of a trait changes due to evolution which we called exaptation. It also occurs due to hitchhiker effect, this effect occurs when the change occurs in the frequency of allele not due to natural selection but due to selective sweep with the nearby gene.