This definition states how cetaceans (whales and dolphins) evolved for the last fifty million years.. Around 50 million years ago, there was a completely terrestrial mammal called Pakicetus. Pakicetus would occasionally go to the river banks to catch and eat fish. This would require swimming skills. This eventually drove Pakicetus to evolve. The legs became suited for water, and it learned how to hold its breath longer. Pakicetus evolved into Ambulocetus, which in turn evolved in Rodhocetus. Rodhocetus had limbs for diving, along with a blowhole, but had no purpose for land travel. Rodhocetus soon lost its hind legs and became Dorudon around 40 ma. Dorudon had dorsal fins and would give raise to many types of dolphins and whales in its future. The proof for the evolution of cetaceans is that they have a pelvic bone that remains where their legs had once been. That is it...
This was the evolution of cetaceans.
by WhoDatFreshBoi May 16, 2017
Get the Evolution of Cetaceans mug.Evolution is just a theory. What I don't get is how people can say it makes no sence that organisms are always evolving. There are examples of evolution all around us. Look at insects and farmers. Say a farmer is growing carrots, and there is a species of carrot eating insects that could potentially ruin his crop, what does the farmer do? The farmers sprays his crops with pesticides to kill these insects. But, these farmers have noticed that the exact same pesiticides they've used in previous years to kill the exact same insects are no longer working. Why? Because scientists have found out these insects are evolving to form a resistance to these pesticides. This is why every year new, stronger pesticides have to be created for crops(such as carrots).
Another example of evolution is found in the medical world. 70 years ago, it would be unheard of for someone to get Chicken Pox more than once. Now, some people get it twice, even 3 times. Why? Because the Chicken Pox virus is evolving, and changing, even growing a resistance antibiotics.
These are 2 examples of evolution in our modern world.
These are 2 examples of evolution in our modern world.
by Unbiased Reasoning July 29, 2006
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The best and most elite clan in ROBLOX sword clan history. They can destroy and clan that stands in there way.
by bloozyC July 31, 2019
Get the Evolution Resurgence mug.There is no such thing as evolution, just a list of creatures that Chuck Norris has allowed to live.
by Mr Cynical August 29, 2006
Get the evolution mug.Charles Darwin: Here is my theory of evolution
Christians: No fuck you animals are the way God made them!
Christians: No fuck you animals are the way God made them!
by laserman413 October 3, 2016
Get the Evolution mug.The greatest series of football games (soccer to the damn yanks) for the Playstation 2 ever, beats FIFA's ass every time due to consistently better gameplay and the fact that FIFA is for pussies and charlatans. Most recent version is Pro Evolution Soccer 5 which should be owned by all proper men.
by thealmightycraig June 20, 2006
Get the Pro Evolution Soccer mug.A change in populations over time.
Charles Darwin and others first gave the theory serious light, and it has been proven to be true.
Charles Darwin and others first gave the theory serious light, and it has been proven to be true.
The first human arguably started with Homo Erectus, some dude with an ape like head but used fire, tools, and language, then evolution marched on to have groups like Neanderthals and eventually Homo Sapiens Sapiens (us).
The evolution of the music industry is interesting.
The evolution of the music industry is interesting.
by happyatcommonsense December 3, 2017
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