How were the first mammals created?

Question

Now when but how.

genericname85 · Accepted Answer

1978, when the first test tube baby or in vitro fertilization was conducted. all the others weren't "created". they evolved from Brasilodon quadrangularis which is considered the first mammal which evolved from Cynodonts (which weren't mammales) roughly 225 million years ago.

and those all go back to the first self replicating rna molecules which emerged as a chemical process involving Ribose sugar, and a Nucleic Acid (hence the name) consisting of adenine, guanine , cytosine, or uracil. this is the starting point of where we distinguish "dead matter" from "living matter". this later evolved to Deoxyribonucleic acid (or DNA), which to this day you and me are made of. those were chemicals that were plentiful on the planet and were probably solved from minerals through the energy of the sun and mixed in the liquid water than later existed on earth, facilitaing the chemical processes that would later form life.

and you know that you're a part of that lengthy evolution, cause a more developed variation of a particular DNA polymer is litterally still the building block of your very body. and it's different enough from mine that we can definitely say that we're different people but we can still also definitely say that we belong to the same species.

1

0

The_Confusion · Accepted Answer

First of all, let me introduce myself. I'm a know-it-all.  Secondly, I have nothing to say.

Daniela1982 · Accepted Answer

They were created as adults and with the ability to reproduce, or else they would have died out, real fast. The only mammal that lays eggs is the platypus. All others have live birth, including whales.

Advisor Smith · Accepted Answer

The first mammals evolved from therapsid ancestors in the Triassic period, around 225 million years ago. This process was gradual, driven by natural selection. Key adaptations such as endothermy (warm-bloodedness), the development of a neocortex, and differentiated teeth allowed early mammals to exploit ecological niches distinct from dinosaurs. Fossil evidence and genetic studies provide insights into these evolutionary changes, marking a major diversification in the tree of life.

elaphe · Answer

I have several points: 1) Laying eggs is sexual reproduction because the egg is fertilized by sperm. Egg + sperm = sexual reproduction. 2) Some mammals do lay eggs. These are called monotremes (platypuses and echidnas). All female mammals (including people) have eggs. They are retained within the mother and they young is born after it is developed, being protected and nourished by the mother's body instead of outside the mother inside a shell-encased egg. Some snakes and a few lizards do this, too.

NathanDavis · Answer

there were in fact... species in between

you had the mostly, reptilians who would lay eggs, and then... you had these reptilians things who were mammal like, and started to evolve onto something else in the middle, or intermediate

and from these ancestors, came the placental mammals (rather than eggs) which were the ones to turn into the many modern mammals we see around today, lol

Maybe_Maybe_not · Answer

It all started with  a fish farming jellyfishes , evidently: I recommend prioritizing jaws to facilitate attacks early on, watch out for sharky though

RavVid · Answer

Well in between egg layers and placental mammals were marsupials. But even within reptiles, snakes do live births. Not all marsupials have pouches but they are sort of wombs. With kangaroos a very immature fetus makes it's way to the pouch and suckles there on milk.

But there is still a placental phase in marsupials before the pouch phase.

Conceptually I think we could see this progressing into placental mammals

goaded · Answer

We had hens that laid soft eggs from time to time. It's not a stretch to imagine the egg getting stuck inside and hatching that way... Then there's the whole milk thing. Mammals split off from dinosaurs before the most recent global extinction event.

It's an interesting question you should try to find in scientific literature, not social media!

(Eggs are also from sexual reproduction.)

AmeerX · Answer

I think all the creatures were created when Earth was created by God.
The Gods timing is different so it coincides in some ways with the evolution but definitely not the way people think of Darwinian evolution. More like the way creationism happened.

SixFootSexy · Answer

To be honest, nobody knows. But it's VERY unlikely that it happened the way that evolutionary scientists believe it did.

DJB72 · Answer

Better question: how was Life started? No scientific proof has ever been found to demonstrate what led non-living chemicals to suddenly make life. It defies natural law...

Amur8711 · Answer

Mammals are not the only animals that give birth to live young, an die there are mammals that lay eggs. Also before there was reptile and mammals there were animals that were ancestors to both that were considered both reptile and mammals. As our when reptiles prodomently laid eggs and mammals had live young I am not sure. But I am sure mammals made this adaptation because of more unstable or harsh environment. Having the young developed inside increases it's survival to development.

SeekerOfTruth007 · Answer

Fact is, God created us from a primate with an IQ so low it cannot even be rated on an IQ scale. Even the Bible tells you that humans are no better than animals, and one author even called himself a "worm".

Grond21 · Answer

I don't think macroevolution was the mechanism for the origin of species

Staximus · Answer

A lizard got caught in a blizzard and lost his gizzard. Then he met a wizard, who said "it's cold, do you want to be a mammal?" So he turned him into a camel.

AviatorTom · Answer

Fish wandered onto the land and developed air-breathing lungs, eventually becoming what we now classify as mammals.

exitseven · Answer

Alien beings creates mammal DNA and tried it out on planed Earth.,

andreasderjuengere · Answer

Some woke movement wanted a difference, and... Voilà - there were the mammals.

Dongie · Answer

God made the beasts of the field. And every creeping thing He made. Adam named each and everyone of them as the Lord had them come near.

kaucky1 · Answer

Whatever the names were they appeared but lets not waste magick making more beings made of words and names

OtterMan68 · Answer

mamals still use eggs. They are fertilized in the womb.

Jamie05rhs · Answer

It's called Creation for a reason.

NamerOfStars · Answer

Natural selection, same as... Oh, come ON!

msc545 · Answer

With a Lego set, of course!

Reijen · Answer

Gradual change over a period of time.

CubaPirate · Answer

Evolution imao

Anonymous · Answer

They evolved from some reptilian species.

negrl4a69 · Answer

Same way we were. Nobody really knows

Anonymous · Answer

They probably evolved from some reptilian species.

jahaims · Answer

Evolution

MrGSpotHer · Answer

Evolution is a bitch

How were the first mammals created?

Most Helpful Opinions

AI Opinion

What Girls & Guys Said