evolution?

Question

have you ever noticed that old men often have large ears and noses, my sister says this is because it carries on growing. also why do men lose hair and women dont? what is the reason for this? and when we evolved how come we lost hair is some places but kept it in other places, just wondered what determined us to lose our fur

mari j: when did i say we evolved from monkeys? if your gonna answer atleast read the question x

Answer 1

Large ears and noses could as easily be because flesh has diminished or sagged away leaving the appearance of increased prominence. Meanwhile gravity is pulling on the cartilage in noses and ears giving the appearance of growth. Another suggestion could be small eared people die young ; )

For male hair loss I would ask what else does this gene do. Very often genes are expressed in several ways. The cells they are expressed in influence how they act within the body. This can lead to more than one phenotype. This is pleiotropy. One example of pleiotropic expression is thought to connect why blue eyed white cats are deaf. White allele suppresses all melanin production giving a white coat and blue eyes. Unfortunately melanocytes are in the ear so their suppression interrupts the normal neural signal from the ear lleaving the cat deaf.
http://ib.berkeley.edu/courses/ib162/Week3a.htm
Since the x chromosome carries the gene I would look to see what function it has in females. Then the hair loss is just collateral expression in males.
Why did the hair recede. Look at the book 'The Descent of Woman', by Elaine Morgan for an amusing rebuttal to Desmond Morris's 'Descent of Man'. He says men went hunting she says women went swimming.
http://www.bbc.co.uk/dna/h2g2/A730531
http://www.riverapes.com/
http://users.ugent.be/~mvaneech/Morgan.html
Ian Tattersall has said "There are all kinds of notions as to the advantage of hair loss, but they are all just-so stories."

Some link the development of sweat glands led to the loss of hair.
http://www.bio.net/bionet/mm/mol-evol/1996-November/005012.html
Others link it to skin parasites based on the divergence of hair lice from clothing lice
http://www.newscientist.com/channel/being-human/human-evolution/dn3807-early-humans-lost-hair-to-beat-bugs.html
Is there fossil evidence of hair recession?
http://www.askabiologist.org.uk/punbb/viewtopic.php?pid=1405
"thermoregulation hypotheses suggest it happened about 1.7 million years ago" while "clothes lice seem to have diverged from head lice 107,000 years ago "
Some think that the rise in skin pigmentaion was the cause not the result of hair loss.
Why Humans and Their Fur Parted Ways.
http://www.freerepublic.com/focus/f-news/966532/posts

'New Look at Human Evolution' by editors of Scientific American specifically addresses this question.

http://discovermagazine.com/1993/nov/thenakedandthebi317
http://www.scienceforums.net/forum/showthread.php?p=352849

There are lots of theories.

Answer 2

one million) According to evolutionists, Humans developed from apes? Humans are apes through definition. Linnaeus categorized us as such and he used to be a creationist. two) There are many demonstrated tips in technology, however evolution is only a thought. False because of a false impression of the phrase thought. A reality, in technology, is a discrete factor of knowledge. Theories attach tips and provide an explanation for them. There isn't any greater category than thought. three) A transitional sort is a fossil of an animal that's facet one species and facet yet another. False. All organisms are transitional. four) The age of the earth is discovered through scientists completely via the radioactive relationship of fossils ? The age of the Earth used to be discovered through relationship a meteor at the assumption that the Solar System used to be the entire identical age. All different calculations are compatible the age located. five) The clinical process starts with a prediction after which appears for proof to help that prediction? It starts with commentary. Then a speculation is shaped from that commentary. After the speculation is shaped, scientists appear for proof to help or falsify the speculation. 6) The thought of evolution involves the Big Bang? False. 7) To suppose in evolution is to suppose that existence and topic got here from not anything? False.

Answer 3

There is a disturbing trend of scientists, teachers, and students coming under attack for expressing support in the theory of intelligent design, or even just questioning evolution. The freedom of scientists, teachers, and students to question Darwin's theory, or to express alternative scientific hypothesis is coming under increasing attack by people that can only be called Darwinian fundamentalists.”

New Ben Stein Flick, Expelled, Blows the Whistle on the Evolution.
Expelled is a disturbing new documentary that will shock anyone who thinks all scientists are free to follow the evidence wherever it may lead.

http://www.expelledthemovie.com/

Answer 4

first of all, we did not evolve from monkeys... monkeys and humans had a common ancestor. second, male-pattern baldness is a sex-linked gene, which means the gene for it is on the x chromosome... women have 2 Xs so they would only lose hair like that if they had 2 of the balding genes. also, hair loss partly has to do with the environment.

Answer 5

We may have lost hair to deal with heat or it may be a trait called neoteny where features of infancy remain in adulthood the other hair like pubic and armpit is probably sex related like to turn on a mate hair loss is related to higher testosterone in males.

Answer 6

woman do lsoe hair they just replace it faster than men, i've always lost alot of it.
protectiion purposes from temperature and microbes, etc.becasue they are the most sensitive area of the body.
as we evolved from monkeys to men climate and habitat i would have to guess.