Probably sea scorpions venturing on the beach to scavenge dead animals washed up - as nothing else lived on land, the beaches were swamped with carrion. Those were mainly aquatic though. The first really terrestrial arthropods were possibly tiny mites and silverfish-like animals.
The sea
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fossils
no, i dont know what they are, but they are not arthropods
NO. Arthropods do not have a 4 chambered hearts.
yes
The sea
Around 400 million years ago, in the Devonian, the age of sharks and early amphibians.
Arthropods.
A. Arthropods
Arthropods
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Arthropod evolutionary process. During the evolution of arthropods, the number of legs reduced. Definition of leg: The lower extremity of the animals that is in direct contact with the ground in standing or walking. A limb that used especially for supporting the body and for walking and crawling. Modified legs, is not leg. Mantis is 4-legged not 6-legged. 2-legs arthropods will appear on earth in the future. There are four-legged arthropods now. But all arthropods are not four-legged. Centipedes, spiders and insects there are still. There will be two-legged arthropods in the future and all arthropods will not be two-legged. But over time, their number will be increased gradually. 4-legged and 2-legged arthropods are not insects. They are new classes. Stronger blood circulation system is necessary to deliver blood to the head in stand upright. Ramin Amirmardafr
fossils
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.
They express the characteristics inherent to arthropods. All insects are arthropods. Not all arthropods are insects.
NO Mammals are not arthropods. Arthropods are insects.