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When did fish first appear in the fossil record?
The first known vertebrate fossils, found at the Chengjiang locality in China, date back to the early Cambrian. These early vertebrates, such as Haikouichthys, are small, tapered, streamlined animals showing eyes, a brain, pharyngeal arches, a notochord, and rudimentary vertebrae. Vertebrates appear to have radiated in the late Ordovician, about 450 million years ago. However, most Ordovician fossil fossil vertebrates are rare and fragmentary, although available material suggests that ancestors of the sharks and jawed fish were present along with various lineages of armored jawless fish. By the middle Silurian, about 400 million years ago, the picture is clearer: the armored jawless fish were quite diverse, and the first definite jawed fish had appeared -- the Silurian is sometimes called the "Age of Fishes." By the late Devonian, 360 million years ago, early cartilaginous fish and bony fish were diversifying.
When did modern humans appear on earth according to fossil records?
According to the fossil records, the modern humans did appear on earth more than 130,000 years ago.
What are two things that scientists learn from the fossils record?
The fossil record provides evidence about the history of life and past environment on earth. The fossil record also shows that different groups of organism have changed over time.
How many years ago were protists first found in the fossil record?
Protists were first found in the fossil record around 2.1 billion years ago.
When did abundant fossil evidence first appear in the geologic record?
Abundant fossil evidence first appeared in the geologic record during the Cambrian Period, around 541 million years ago. This period is known as the "Cambrian Explosion" because it marked a rapid diversification of marine life and the emergence of many major animal groups.
Why is the fossil record unable to provide a full portrait of the times in which the fossilized animals and plants live?
The fossil record is incomplete.
Is the fossil record complete?
No, the fossil record is not complete. Not all animals and plants were fossilized during the last 4 billion years of the earths existence.
Is the fossil complete?
No, the fossil record is not complete. Not all animals and plants were fossilized during the last 4 billion years of the earths existence.
When did the Equus first appear in the fossil record?
The Equus genus first appeared in the fossil record around 4 million years ago during the Pliocene epoch.
Why is the fossil record unable to provide a full portrait of the times in which the fossilized animals and plants lived?
The fossil record is incomplete because not all organisms fossilize, and not all fossils are found or preserved. Fossilization depends on specific conditions such as rapid burial and mineralization. Therefore, the fossil record only represents a small fraction of the organisms that lived in the past.
Any precambrian tine animals and plants that have turned into fossils?
Yes, although the fossil record for the precambrian period is scarce. See related link.
Why are few animals known from their fossil record?
Dinosaurs and fish
What arose first archaebacteria animals fungi plants protists?
Archaebacteria arose first, followed by protists, then animals, fungi, and plants. This evolutionary sequence is generally accepted by scientists based on evidence from the fossil record and molecular studies.
Which evidence for evolution uses impressions of plants and animals pressed into sedimentary rock?
The evidence for evolution that uses impressions of plants and animals into sedimentary rock is the study of fossils. The study of fossils and where they are found is a determining factor about what was going on in a period of history.
Do most animals and plants that once lived on Earth have left fossil evidence?
No, most animals and plants that have lived on Earth do not leave fossil evidence. Fossilization is a rare process that only occurs under specific conditions, so many organisms decompose before they can become fossils. This is why the fossil record is incomplete and biased towards certain types of organisms.
How do plaints and animals fossil record change?
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What link do seed ferns represent in fossil record?
The first fossil records of vascular plants that is land plants with vascular tissues Fossil ferns and seed ferns include Pecopteris Cyclopteris
