SAM T Q: From Reptiles to mammals. When reptiles reshuffled their bones...?

Question

Here are the facts that have been found:

>mammals = mammary glands (Duh), reptiles = no mammary glands (not even sweat glands)

>Mammal mothers have placentas for the nourishment and development of their unborn young. Reptiles do not.

>Mammals have a diaphragm that separates the thorax from the abdomen. Reptiles don't have a diaphragm.

>The "organ of Corti" in the ears of mammals is not found in reptile ears.

>Mammals also have three bones in their ears, while reptiles have only one. (Evolutionary theory attempts to explain it as follows: Reptiles have at least four bones in the lower jaw, whereas mammals have only one; so, when reptiles became mammals there was supposedly a reshuffling of bones; some from the reptiles lower jaw moved to the mammals middle ear to make the three bones there and, in the process, left only one for the mammals lower jaw. I wonder if there is a fossil record of this transition.)

>Reptile legs are anchored at the side of the body so that the belly is on or very near the ground. In mammals the legs are under the body and raise it off the ground.
(This change has necessitated widespread alterations of the skeleton and the musculature.)

>Mammals have greatly elaborated their teeth. Instead of the simple peg-like teeth of the reptile, there is a great variety of mammalian teeth adapted for nipping, grasping, piercing, cutting, pounding, or grinding food

> When the amphibian supposedly evolved into a reptile, the wastes eliminated were noted to have changed from urea to uric acid. When the reptile became a mammal there was a reversal. Mammals went back to the amphibian way, eliminating wastes as urea. In other words, evolution went backward... something that it isn't supposed to do.

How then did evolution make reptiles evolve into mammals?

My sources:
http://stforum.5gbfree.com/forum.php

Oh great! J.P made it! He hadn't answered in 2 hours last time I checked his profile, so I was worried he wouldn't make it on time. I just figured either way he could just check my profile and get to the question anyways. J.P, how did the mammary glands get set up? And the bone reshuffle? Those are probably the bigges questions I have under the category of reptiles --> mammals.

Answer 1

"evolution went backwards, this is something it's not supposed to be able to do."

Actually, this happens all the time. If the gene continues to exist in the 'junk dna' and the intron is reactivated, reversions can happen in only a few generations.

The fact mammals rather rapidly restored an amphibian trait is evidence FOR evolution, not against.

You're assuming evolution is a progressive phenomenon, it's not. It moves in any direction at all that there are available alleles for and that benefit the population.

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You know what sam? I don't know. I'm not all knowing, contrary to some people's apparent opinions of me.

However, I know that there are plenty of sources you can turn to in order to find the answers.

Look dude. You have a genius IQ. I know it, you know it, Tony knows it. If you aren't willing to do your own unbiased research, you might as well take your IQ test and wipe your butt with it, because then it'll do at least that much good for you.

Bias is the first step towards ignorance.

You're better than that.

Prove me right, will ya?

Answer 2

You are spewing misinformed nonsense. You perpetually get the facts wrong. Just give it up; your lies are too transparent.

There are a variety of "organ of Corti" equivalents that are not spiral cochleas that have the same "hair cell" , endolymph, perilymph compartmental structure in a liner organ.

Some lizards have a non-muscular proto-diaphragm, and crocodilians have muscular diaphragms. Some viviparous reptiles have placentas.

Not all mammals have placentas. Marsupials do not, and monotremes are egg-layers.

The inner ear bone are easily studied by embryologists. You try to make is sound mysterious, but it is rather simple.

Dinosaurs with walked on two legs (e.g. T. rex) had a pelvis that brought the legs under the body.

Dinosaurs had socketed teeth.

Evolution isn't directed. Complex forms can revert to simple forms. Although most reptiles secrete uric acid as the primary nitrogenous molecule, the turtles use uric acid. Further, human and other mammalian kidneys secrete uric acid.

ADDENDUM:
Apocrine (sebaceous) sweat glands are part of the hair follicle unit, secreting the lubricant necessary for hair growth and appear to have evolved from sensory cells.

Answer 3

And your alterative scientific theory to explain the observable fact that mammals came into existence long after reptiles, and replaced them as the dominant life forms, would be ... ?? It's so easy to sit back and attack the best possible theories offered by the world's greatest scientific minds, without offering any intelligent alternative, on no more basis than, "well, my personal interpretation of the Bible doesn't agree with them". (Have you consdered the remote possibility that your biblical interpretaions just might not be infallible? Especially since the majority of Christians don't agree with you?) So I ask again - if this observable change didn't happen by biological evolution, please propose a viable alternative theory. Because otherwise you are just making noise.
.

Answer 4

There are some transitional fossils. They are called the therapsids (part of the synapsid branch of reptilian phylogeny) and they coexisted with dinosaurs. Specific examples include Dimetrodon and Morganucodon.

Answer 5

There's that pesky platypus......
I'd like to know how that happened!

Answer 6

Wrong section.

POST IN BIOLOGY!