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Yes. There have been several episodes of mass extinction. The worst was at the end of the Paleozoic era. The most famous came at the end of the Mesozoic, when the dinosaurs disappeared. Nature is cruel.

Of course, some people say that species have not really become extinct, but merely evolved into different forms.

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14y ago
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14y ago

yes. if you think about it all the dinosaurs are now extinct.

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12y ago

Many thousands of organisms and species have become extinct.

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Q: True or false that most organisms that have ever lived on Earth are now extinct?
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Related questions

What is the organisms that once lived on earth but all of their kind have died out?

The answer is Extinct!


What is organisms that once lived on earth but all of their kind have died out?

The answer is Extinct!


Organisms that once lived on earth but all of their kind have died out a dead species?

A species that has entirely died out is considered extinct. An example of extinct species are the dodo, saber-tooth tigers, woolly mammoths, Canary Island giant rats, Cape lion, and the Red Rail.


The observation that organisms arise in locations where similar extinct organisms lived is referred to as what?

Biogeography


What type of organism is no longer exists and will never again live on earth?

There are many organisms that once lived on Earth but have since gone extinct. Some examples include every species of dinosaur, dodo birds, and golden toads.


What happened to most species that lived on earth?

they got extinct


Fossil evidence indicates that most extinct primate species lived in trees?

false


Dinosaurs lived about a million years ago True or false?

false (They became extinct about 65 million years ago.)


What animal species are extinct?

just about every one. 90% of all creatures that have lived on earth are extinct.


How long have unicellular organisms have lived on Earth?

they have lived for up to millions of years


What has happened to most organisms that have ever lived on earth?

They have or are fossilizing.


What do you call an animal or plant that once lived on earth and can no longer be found alive today?

extinct