Common ancestor of sharks
WebThe common ancestor of all those different organisms (ray-fins, coelacanths, lungfishes, tetrapods, etc.) was neither a lobe-fin nor a ray-fin. This ancient vertebrate lineage had fins (with lepidotrichia), scales, gills, and lived in the water. WebThe earliest fossil evidence for sharks or their ancestors are a few scales dating to 450 million years ago, during the Late Ordovician Period. Emma Bernard , a curator of fossil fish at the Museum, says, 'Shark-like scales …
Common ancestor of sharks
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WebJul 8, 2024 · The oldest find of this species is from the Middle Jurassic (165 million years ago) and it didn’t have much in common with today’s mackerel sharks. Palaeocarcharias was a small sluggish benthic shark, not … Web5) The legless condition that is observed in several groups of extant reptiles is the result of _____. A) their common ancestor having been legless B) a shared adaptation to an arboreal (living in trees) lifestyle C) several instances of the legless condition arising independently of each other D) individual lizards adapting to a fossorial (living in …
WebThe earliest evidence of the ancestors of modern sharks are isolated spines, teeth, and scales that appeared 350 to 400 million years ago in the Devonian Period, known as the "Age of Fishes". Cladoselache , an … Web1 day ago · Aug. 5, 2024 — One of the most exciting discoveries in genome research was that the last common ancestor of all multicellular animals already possessed an extremely complex genome. It has long ...
http://www.elasmo-research.org/education/evolution/earliest.htm WebNov 10, 2008 · Many octopuses evolved from a common ancestor that lived off Antarctica more than 30 million years ago, according to a "Census of Marine Life" that is seeking to map the oceans from ...
WebTwo species are more related if they have a more recent common ancestor, and less related if they have a less recent common ancestor. We can use a pretty straightforward method to find the most recent …
WebDescendants of organism (d) have limbs with digits. Mammals and turtles are more closely related than are lungfishes and sharks. Hagfishes, lungfishes, and frogs have lobed fins Organism (a) is a common … scaffolding writing instructionWebSeraphOfTwilight • 44 min. ago We can almost never say exactly what a common ancestor was, but even if Basilosaurus evolved from a lineage derived from a population of Pakicetus the later would not be their direct ancestor. scaffolding writing in primary schoolWebJan 23, 2024 · “We found the sharks, which use their fins to ‘walk’ around shallow reefs, only split off evolutionarily from their nearest common ancestor about 9 million years ago, and have been actively... sawstop professional built cabinet storageWebBoth dolphins and sharks swim after prey in the ocean. Streamlined bodies and fins provide a big advantage for them, allowing them to swim faster. We know that dolphins and … sawstop professional cabinet saw 1.75hpWebNov 14, 2024 · Dolphins and Sharks. Sharks and dolphins couldn't be more different. Dolphins are mammals, and sharks are fish. A dolphin's skeleton is made of bone, and a shark's skeleton is composed of just ... sawstop professional cabinet saw reviewsWebActinistia. Match each type of vertebrate with a key innovation their common ancestor with other vertebrates was the first to exemplify: Legs: Amphibians. Amniotic egg: Reptiles. … scaffolding written workWebMar 16, 2024 · But even predators as ancient as sharks have predecessors, and a new study published in the journal American Museum Novitates seems to confirm the identity … sawstop professional cabinet saw fence