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What else can I help you with?
Which example best describes life in the precambrian era?
During the late Precambrian, about 560 million years ago, the first confirmed macroscopic multicellular organisms appeared. Around 558 million years ago, the first mollusk, Kimberella,appeared in the fossil record.
Which came first the precambrian or the mesozoic?
Precambrian eon4567.17-542 million years agoMesozoic era251-65.5million years agoSo precambrian came first...........
What is primitive arthropod?
Examples of primitive arthropods might include the trilobite, thought to have made an appearance in the pre-Cambrian period about 500 million years ago. The fossil record indicates they were highly diverse with well over 10,000 species and thrived for over 250 million years, but finally going extinct around the end of the Permian period. Another great example might be the Eurypterid or sea scorpion, a paleozoic arthropod believed to predate the earliest fish. Of those still alive, the peripatus (a genus of the velvet worms) would be a serious contender, primitive in origins and considered the simplest known arthropod, a 'living fossil' dating back 570 million years and thought to be a connecting link between the arthropods and annelids (segmented round worms, like the earthworm).
Human being as you know them have existed for about how many years?
10 million years since our first ancestors and about 250 thousand years for man as you know. 1000 years since we have started to eat our planet to waste.
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.
How long ago did arthropods first appear?
Around 400 million years ago, in the Devonian, the age of sharks and early amphibians.
When did life first appear on land?
Life first appeared on land around 500 million years ago during the Ordovician Period. Plants and some arthropods were among the first organisms to colonize terrestrial habitats, followed by amphibians and eventually reptiles.
When did the first land plants and animals appear in the fossil record?
The first plants with spores, which indicates that they were land plants, appeared in the Middle Ordovician period, about 470 million years ago. First records of tetrapods, or land animals, show up in the fossil record around 370 million years ago.
When did Arthropod first appear on earth?
Arthropods have adapted to life on land, at sea, and in the air. They are invertebrates that includes insects, crustaceans, and arachnids. Some examples of arthrpods are ants, lobsters, and spiders.
When did the first man appear?
5-10 million years ago
When did fish first appear on earth?
About 475 million years ago
When did feathers first appear in nature?
145 million years ago
When did the first repitles appear?
300 Million Years Ago Carboniferous
How long ago did the first dinosaurs appear?
About 230 million years ago.
On which continent did the first australopithecines appear about four million years ago?
Africa
When did the first reptile appear?
300 million years agoThey appeared at the late Triassic period about 230 million years ago.
When did roaches first appear?
They've been around for at least 40 to 50 million years.
