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Back hair is a vestigal remnant of the early evolution of humans, in which all primates were covered head to toe with hair. As early humans lived in Africa, there was evolutionary pressure to have a fine, wispy coat of hair that didn't hold in as much heat.
As early humans started to dress themselves in the skins and pelts of animals, and later in the woven fibers of plants (think cotton and linen), the evolutionary pressure to maintain a dense coat of hair was removed. Since growing hair is an expensive biological process, humans as a whole evolved towards having less and less body hair. Having hair on your back is simply the expression of a minor gene set that dates back to when early humans were completely covered in hair.
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Does the dahlia plant have hairy leaves?
The leaves are slightly hairy.
Does begonia plant have smooth or hairy leaves?
the answer is the plant has very hairy smooth leaves.
An example to explain natural selection?
Temperate climate. You have many organism variation; some very hairy, some hirsute. Climate gets very cold. Those very hairy organism can survive long enough to reproduce and give their progeny their hairy traits. Thus the hairy mate with the hairy and the variation is more on the hairy side, so hair is selected for in this cold and immediate environment.
What is the anatomical difference between the two hairy-nosed wombats northern and southern of the genus Lasiorhinus?
The Northern hairy-nosed wombat is significantly larger that the Southern hairy-nosed wombat.
What did the ancient Greeks call comets?
In ancient roman times they used believe that comets were "bad omens".
What is the history of the phrase hairy edge?
Back in caveman times edges were quite hairy.
Is Alec Baldwin hairy?
It is no secret that Alec Baldwin is covered in hair. He is known to have a very hairy chest and back. Yes, he is a hairy man.
Do moles grow back?
There Hairy and Yes
Hairy back good at sex?
Nothing to do with it.
What does a black hairy jumping spider with white dots on its back looks like?
black hairy with white dots on its back
Does Carson have a hairy back?
Carson shaves his back with a kitchen knife and it is virtually hairless and delicious
What does dragon's eyes mean?
he want to get it from the back>>>>>>
What is a hairy patch on the back without a brown mole?
Typically, a hairy patch or birthmark on the back can signal a spinal abnormality. A doctor should be consulted and an MRI performed to check for nerve involvement. Typically, a hairy patch or birthmark on the back can signal a spinal abnormality. A doctor should be consulted and an MRI performed to check for nerve involvement.
How do you get rid of a huge crush whom you find irresistible?
Imagine them with a hairy back
What was the first Trampoline made of?
Back hair off of really hairy men
In a sexual term what does the term bear back mean?
Bare back means to have sex without a condom. Bear back means you have a very hairy back.
What is schedulable utilization?
I beleive it is a big hairy turd that falls down the back of a mongoose
