生物学101:5 cool examples of convergent evolution.
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14-03-2015, 09:16 PM
生物学101:5 cool examples of convergent evolution.
ようこそう 生物学 学生。 私はエゼキエル。 私は生物学先生。

Evolution is a powerful process, making it so that those who survive pass on genes to decedents that won't stop until all of them are extinct. It is so powerful that even when animals are not the closest relatives they can have the same traits. That is right, we are talking about convergent evolution. It happens a lot and there is a reason.

As we should know evolution works in a way where a species may or not survive. When it survives it fills in a niche. However there are only so many niches on earth. Many times these niches need to be filled, other times the niche can be filled by more than one organism at the same time. There are many examples of convergent evolution, and here are 5 of theme:

5. Triceratops and Rhinoceros.

[Image: triceratops_and_rhino_600.jpg]

The first and most obvious example of convergent evolution is the Triceratops and the Rhinoceros. The reason why these animals are an example of convergent evolution is that both are large herbivores with horns. This is not the only example of animals that share some sort of convergent evolution between these two, but rhinos fill the triceratops old niche so well they use it as example to build up the triceratops when doing research.

4. Rhineuridae and Earthworms

Now what do these have in common? One is a vertebrate the other does not even have a skull. One is a family, the other is a Order. So what is it that they share? Well first both are blind, as you don't need eyes when you are burrowing underground. Did I mention that they are also pink? That to is funny. What is also amazing about these animals is that they share the same niche but live at the same time. It would not be a surprising if our lizard ate our worm. Though the worm has a bigger ecological impact, it still does not stop that these two a pink burrowers and are good at their job. Did I also mention they have segments?Big Grin


3. Falcons and eagles

[Image: Fluttershy_with_falcon_and_eagle_S2E07.png]

In recent news it is confirmed eagles are not closely related to falcons. Meaning that both give a excellent example of convergent evolution. It should be obvious why they show convergent evolution, but for the sake of information I am going to explain any way. First both are powerful predators, using speed and sharp claws to hit their prey hard. They are also a have sharp beaks used to tear up their prey. In fact their similarities are enough that if it weren't for genetics, we might have placed them in the same taxonomic group.



2. Snakes and Caecilians

This is a great example of convergent evolution because not only do they share many things in common they also show convergent evolution through my favorite thing in evolution, transitional fossils. Now let us go over the modern day examples.

First off snakes and caecilians are both legless animals. Now this might be the same as number 4 but their is more to it. Snakes and Caecilians also have different birth patterns in their own groups. Some snakes and caecilians can either lay eggs or give birth live young. They also look alike, I mean a lot! I know this is obvious but they look way to much for their own good. If caecilians get the evolutionary cards right they might be able to escape predators by looking like coral snakes.

On to the fossil similarities, both where once burrowing animals with legs. The caecilians' had Eocaecilia, and the snakes' had Eupodophis. Both following the same evolutionary line. Two burrowing animals that eventually became legless and became strikingly similar. Seriously it is very not funny.


1. Mosasaurs and Cetaceans

Dallasaurus and Pakicetus, Aigialosaurus and Ambulocetus, what do this animals have in common? Both are two groups that will evolve into the most deadly sea animals in all of earths history, the Mosasuars and the Cetaceans. What makes these animals to same? How can they both be the deadliest when you got baleen whales? Well let me break it down. First, both animals are marine vertebrates that are not fish or amphibians. They have also produced some of the largest and deadliest predators. On the mosasaur side there was tylosaurus, and on the cetacean side there was Livyatan melvellei, and thank god it is extinct. Seriously this thing could make megalodon its bitch, trust me this thing be extinct is good.
[Image: prehistoric_mammals___livyatan_melvillei...79x53f.jpg]

The major different between these two is how long it took for them to evolve. Mosasaurs where able to evolve in the late cretaceous in a heartbeat, with only some 30 million years of evolution, cetaceans took around 55 million. Sure cetaceans are still alive but given a time before now, they still did it faster.

宿題: Try to find some convergent evolution examples of your own. As we know you can tell two of these examples already show convergent evolution with each other on their own. So do you have any examples?

P.S: Buy the way 宿題 is shukudai which means home work

[Image: varn02.jpg]

ありがと ございます and keep learning.

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14-03-2015, 11:29 PM
RE: 生物学101:5 cool examples of convergent evolution.
Thylacine and wolf
Dolphin and bat (echolocation)
Ostrich and emu
Diatryma and velociraptor

“I am quite sure now that often, very often, in matters concerning religion and politics a man’s reasoning powers are not above the monkey’s.”~Mark Twain
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15-03-2015, 04:55 PM
RE: 生物学101:5 cool examples of convergent evolution.
(14-03-2015 11:29 PM)Full Circle Wrote:  Thylacine and wolf
Dolphin and bat (echolocation)
Ostrich and emu
Diatryma and velociraptor

How about marsupial lions and tigers?

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16-03-2015, 05:23 AM (This post was last modified: 16-03-2015 05:31 AM by TheInquisition.)
RE: 生物学101:5 cool examples of convergent evolution.
The Fossa of Madagascar.

Bats and birds.

Gods derive their power from post-hoc rationalizations. -The Inquisition

Using the supernatural to explain events in your life is a failure of the intellect to comprehend the world around you. -The Inquisition
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16-03-2015, 03:42 PM
RE: 生物学101:5 cool examples of convergent evolution.
(16-03-2015 05:23 AM)TheInquisition Wrote:  The Fossa of Madagascar.

With what other animal?

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