Why an Ichthyosaur Looks Like a Dolphin – National Geographicwww.nationalgeographic.com › science › article › why-an-ichthyosaur-loo…[1]
Are Dolphins Convergent Evolution?
The driver of convergent evolution is the availability of specific roles offered by the environment. Oceans cast swift-swimming predators, be they sharks or dolphins.[2]
Did Dolphins Evolve From Ichthyosaurs?
Mesozoic “fish lizards”, ichthyosaurs were marine reptiles that independently became adapted to a life at sea around 200 million years before dolphins.Feb 6, 2015[3]
Are Ichthyosaurs Related To Dolphins?
Although they superficially have a similar shape and they exploit similar environmental niches, we know that ichthyosaurs are reptiles and thus they are not dolphins (mammals) nor sharks (fish).[4]
Why Are Dolphins And Ichthyosaurs Similar?
Gradually sharks, ichthyosaurs, and dolphins came to look alike because natural selection favored one particular shape over all others for rapid movement through the seas. Figure legend: Convergent Evolution. Although very different species, the dolphin and the icthyasaur look alike.[5]
How Big Were Reptiles Before The Flood 12,000 Years Ago
Evidence of 12000-year-old flood that drained ancient lake at high …www.dailymail.co.uk › sciencetech › article-9869161 › Evidence-12-000-…[6]
What Could Cause A Massive Flood During An Ice Age?
Over thousands of years, an ice dam repeatedly formed and burst, causing dozens of floods. Today, widespread reminders of these Ice Age Floods dot the landscape: gigantic basalt coulees, enormous dry falls, large boulders moved hundreds of miles, high water lines, and huge current ripples.[7]
When Did The Red Sea Flood?
Local media in Egypt are reporting that around 15 people have been killed and almost 50 injured as a result of torrential rain and flooding in Egypt that began late Wednesday, 26 October, 2016. Heavy rains caused flooding in several towns in Upper Egypt and along the Red Sea coast.[8]
When Was North America Flooded?
Starting about 12,900 years ago, the Northern Hemisphere was abruptly gripped by centuries of cold, an era technically known as the Younger Dryas. Scientists have suggested this chill helped wipe out most of the large mammals in North America as well as the so-called Clovis people.Nov 5, 2012[9]
What Era Did The First Dinosaurs And Flying Reptiles Appear?
Like their cousins the dinosaurs, pterosaurs stand out as one of evolution’s great success stories. They first appeared during the Triassic period, 215 million years ago, and thrived for 150 million years before going extinct at the end of the Cretaceous period.[10]
In Which Era The Flying Reptiles Are Seen On The Earth?
pterosaur, any of the flying reptiles that flourished during all periods (Triassic, Jurassic, and Cretaceous) of the Mesozoic Era (252.2 million to 66 million years ago).[11]
When Did The First Dinosaurs Appear?
Triassic Period (252 to 201 million years ago)
Unlike today, there were no polar ice caps. It was in this environment that the reptiles known as dinosaurs first evolved.[12]
What Was The First Flying Dinosaur?
The findings suggest that Yi and Ambopteryx were not only incapable of powered flight, as previously thought, but they weren’t even as good at gliding as some modern animals like flying squirrels. This means they were almost certainly tree-dwelling animals that only glided short distances, the team believes.[13]
What Era Did Dinosaurs And Birds Appear?
About 150 million years ago, in the Jurassic, the first birds evolved from small, feathery, raptor-like dinosaurs, becoming another branch on the dinosaur family tree.[14]
What Are The 3 Main Groups Of Mesozoic Marine Reptiles
Different lineages of reptiles invaded marine environments in the Mesozoic, giving rise to at least a dozen groups. The four major groups are Sauropterygia, Ichthyopterygia, Mosasauridae, and Chelonioidea (sea turtles).May 19, 2009[15]
Were There Marine Reptiles In The Mesozoic?
However, other groups of large reptiles also lived during this time, and most are less familiar. The Mesozoic oceans played host to a myriad of large reptiles, including ichthyosaurs, plesiosaurs, nothosaurs, placodonts, and mosasaurs.[16]
What Was A Marine Mesozoic Reptile?
Among the reptiles that have adapted to life at seas in the Mesozoic Era are: ichthyosaurs (Ichthyosaurus, Ophthalmosaurus), plesiosaur (Plesiosaurus, Pliosaurus), mosasaurs (Mosasaurus, Tylosaurus) nothosaurs, placodonts, talatosaurios and sea turtles (of the order of Testudines).[17]
What Are 3 Characteristics Of Marine Reptiles?
Marine species retain the defining reptile characteristics of tough scaly skin, amniotic eggs and behavioural thermoregulation (see below). However they also have anatomical and physiological adaptations to an aquatic existence.[18]
What Large Marine Reptile Existed In The Mesozoic Era?
Summary: In the Mesozoic, the time of the dinosaurs, from 252 to 66 million years ago, marine reptiles such as ichthyosaurs and plesiosaurs were top predators in the oceans. But their origins and early rise to dominance have been somewhat mysterious.[19]
Which Animal Has The Least Functional Cerebrum? A. Birds B. Mammals C. Reptiles D. Amphibians
The reptilian brain – PMC – NCBIwww.ncbi.nlm.nih.gov › pmc › articles › PMC4406946[20]
Do Reptiles Have A Cerebrum?
Although pallial structures exist in amphibians and fish, reptiles and mammals are the only vertebrates to have a cerebral cortex with a clear, though simple, three-layered structure, similar to that of mammalian allocortex.[21]
What Animals Have A Cerebrum?
A cerebral cortex, with its typical layered organization, is found only among mammals, including humans, and non-avian reptiles such as lizards and turtles. Mammals, reptiles and birds originate from a common ancestor that lived some 320 million years ago.[22]
Do Reptiles Have A Cerebellum?
The reptilian brain, the oldest of the three, controls the body’s vital functions such as heart rate, breathing, body temperature and balance. Our reptilian brain includes the main structures found in a reptile’s brain: the brainstem and the cerebellum.[23]
Do All Mammals Have A Cerebellum?
In fact, if we put brains of different mammals next to each other, the similarities are easy to spot. Even though the brains vary (a lot) in their size and in their folds, they all have the same parts. All these brains have a cerebral cortex, a cerebellum, and a brain stem (see Figure 1B).[24]
What Is One Main Way In Which Reptiles Differ From Amphibians
Amphibian or Reptile? Here’s the Difference – Shedd Aquariumwww.sheddaquarium.org › stories › amphibian-or-reptile-here-s-the-differe…[25]
Why Are Most Giant Monsters Reptiles Or Insects
Why don’t we have many giant animals anymore? | Live Sciencewww.livescience.com › News › Lifes-little-mysteries[26]
Why Were Insects So Big In Prehistoric Times?
The leading theory is that ancient bugs got big because they benefited from a surplus of oxygen in Earth’s atmosphere. But a new study suggests it’s possible to get too much of a good thing: Young insects had to grow larger to avoid oxygen poisoning.[27]
Did Insects Used To Be Giant?
Insects reached their biggest sizes about 300 million years ago during the late Carboniferous and early Permian periods. This was the reign of the predatory griffinflies, giant dragonfly-like insects with wingspans of up to 28 inches (70 centimeters).[28]
Why Did Animals And Insects Used To Be So Big?
‘More than 300 million years ago, there was 31 to 35 percent oxygen in the air,’ according to the lead researcher. ‘That means that the respiratory systems of the insects could be smaller and still deliver enough oxygen to meet their demands, allowing the creatures to grow much larger.’Aug 8, 2007[29]
Why Were Animals Bigger During Dinosaurs?
Dinosaurs lived during the Triassic, Jurassic and Cretaceous. During these periods, the climate was much warmer, with CO₂ levels over four times higher than today. This produced abundant plant life, and herbivorous dinosaurs may have evolved large bodies partly because there was enough food to support them.[30]
Resources
[1]https://www.nationalgeographic.com/science/article/why-an-ichthyosaur-looks-like-a-dolphin
[2]https://www.livescience.com/convergent-evolution.html
[3]https://www.nationalgeographic.com/science/article/why-an-ichthyosaur-looks-like-a-dolphin
[4]https://beta.capeia.com/paleobiology/2018/10/15/the-evolutionary-history-of-ichthyosaurs
[5]http://www.brooklyn.cuny.edu/bc/ahp/LAD/C21/C21_Convergent.html
[6]https://www.dailymail.co.uk/sciencetech/article-9869161/Evidence-12-000-year-old-flood-drained-ancient-lake-high-rate-speed-found.html
[7]https://www.nps.gov/iafl/learn.htm%23:~:text%3DOver%2520thousands%2520of%2520years%252C%2520an,lines%252C%2520and%2520huge%2520current%2520ripples.
[8]https://floodlist.com/africa/egypt-deadly-flash-floods-hit-sohag-red-sea%23:~:text%3DLocal%2520media%2520in%2520Egypt%2520are,along%2520the%2520Red%2520Sea%2520coast.
[9]https://www.livescience.com/31810-big-freeze-flood.html%23:~:text%3DStarting%2520about%252012%252C900%2520years%2520ago,the%2520so%252Dcalled%2520Clovis%2520people.
[10]https://www.nationalgeographic.com/science/article/pterosaurs
[11]https://www.britannica.com/animal/pterosaur
[12]https://www.nhm.ac.uk/discover/when-did-dinosaurs-live.html
[13]https://www.newscientist.com/article/2257732-the-first-flying-dinosaurs-were-a-failed-evolutionary-experiment/
[14]https://www.smithsonianmag.com/science-nature/why-birds-survived-and-dinosaurs-went-extinct-after-asteroid-hit-earth-180975801/
[15]https://evolution-outreach.biomedcentral.com/articles/10.1007/s12052-009-0139-y
[16]https://www.accessscience.com/content/mesozoic-marine-reptiles/YB081320
[17]https://izi.travel/en/9cd2-mesozoic-marine-reptiles/en
[18]https://www.degruyter.com/document/doi/10.1515/9780691232447-024/pdf
[19]https://www.sciencedaily.com/releases/2016/05/160520101951.htm
[20]https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4406946/
[21]https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4406946/
[22]https://www.mpg.de/12027342/molecular-atlas-reptile-brain
[23]https://thebrain.mcgill.ca/flash/d/d_05/d_05_cr/d_05_cr_her/d_05_cr_her.html
[24]https://www.frontiersin.org/articles/173628
[25]https://www.sheddaquarium.org/stories/amphibian-or-reptile-here-s-the-difference
[26]https://www.livescience.com/why-no-more-giant-animals
[27]https://www.nationalgeographic.com/science/article/110808-ancient-insects-bugs-giants-oxygen-animals-science
[28]https://news.ucsc.edu/2012/06/giant-insects.html
[29]https://www.sciencedaily.com/releases/2007/08/070806112323.htm
[30]https://www.sciencefocus.com/nature/why-were-dinosaurs-so-big/