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In general the first mammals of any group to appear in the fossil record?
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∙ 14y ago
resembled dogs and cats
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∙ 14y ago
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∙ 12y agoOn earth........? you need some help?
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When did the Equus first appear in the fossil record?
when did the equus frist appear in the fossil record
Did mammals appear in the fossil record after dinosaurs became extinct?
No, mammals lived alongside dinosaurs and their earliest known fossils of about 200 million years old are almost contemporary with the early dinosaur fossils.
When did mammals first appear on earth by paleontologists?
Mammals first appear in the fossil record of the Mesozoic Era.
What is true of the fossil record of mammalian origins?
The fossil record shows that mammals and the great dinosaurs shared the same times. It also shows that mammals made a major surge in population when the dinosaurs died out.
What did the first mammals in the fossil record look like?
Tiny, shrew or mouse-like creatures.
When did abundant fossil evidence appear in the geologic record?
540 Million years ago
Which organisms have produced the oldest fossil evidence?
Cyanobacteria are the first to appear in the fossil record.
The earliest record of mammals comes from which of what rock layers?
The earliest record of mammals comes from sedimentary rock. Sedimentary rocks are deposited in layers. They are an important source of natural resources, such as coal, fossil fuel, and ore.
Are fossils records complete or incomplete?
Fossil records are not complete. By some estimates, less than 1% of organisms that have lived appear in the fossil record.
According to the fossil record when did the first prokaryotic cells appear on your planet?
2.5 billion years ago
Why is it impossible for a cat fossil to be found in the same sedimentary rock layer as a dinosaur fossil?
Because the layer dinosaur fossils are located are from time period and the fact there were no mammals (cat like) on that time, makes it impossible for cats to be found on that layer. Actually the first mammals appear in the fossil record about the same time as the first dinosaurs, but until at the time the dinosaurs died out (65 million years ago) no mammal was quite as large as the modern cat (most were the size of rats or smaller). The first cats (and "dogs") did not appear until about 50 million years ago.
What was the first key hominid trait to appear in the fossil record?
The first key hominid trait to appear in the fossil record is bipedalism, which refers to the ability to walk upright on two feet. This adaptation is characteristic of early hominids and distinguishes them from their primate ancestors.
