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If you are talking about the dinosaurs. Two reasons: First there was a huge volcanic eruptions happening in India. This made the world hotter. Second was a huge asteriod that hit the earth about 65 million years ago.

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What caused the extinction of so many of the reptile groups that flourished?

If you are talking about the dinosaurs. Two reasons: First there was a huge volcanic eruptions happening in India. This made the world hotter. Second was a huge asteriod that hit the earth about 65 million years ago.


Was a dinosour a reptile?

a dino was a reptile, when the first form of reptile started it broke in to two groups one that turned in a dino and also some turned into what we are today.


Are alligators reptile?

yes they are


What is the name of the process in which groups of species die out?

A mass extinction.


What are the 5 animal groups?

Birds,Mammals ,Fish ,Reptile Ampipian


What is the name of the process in which groups of organisms die out?

The process in which groups of organisms die out is called extinction. Extinction occurs when a particular species cannot adapt to changing environmental conditions or faces competition from other species, leading to their eventual disappearance.


Is a crab a fish mammal or reptile?

a fish is nor a mammal or reptile it is broken down in to groups and i know this answer and i am only in elemantry school. :) (not bragging)


What are five groups of vertebrate and their definition?

Fish,Reptile,Mammal,Amphibian and bird


Which domestic terrorist groups flourished during the 1960s and 1970s?

Some domestic terrorist groups that flourished during the 1960s and 1970s in the United States include the Weather Underground, the Symbionese Liberation Army, and the Black Liberation Army. These groups carried out bombings, kidnappings, and other violent acts in pursuit of their revolutionary ideals.


Are dinosaurs classed in different groups?

Yes There is the bird-hipped dinosaurs and the reptile or lizard-hipped dinosaurs. These were further subdivided into smaller groups.


What are the five groups that contain all living things?

Mammal, Archnid, Crustacean, Reptile and Amphibian.


Did early mammals cause the extinction of dinosaurs?

No, early mammals did not cause the extinction of dinosaurs. The extinction of dinosaurs is believed to have been caused by a combination of factors, such as a large asteroid impact and volcanic activity, which led to drastic environmental changes that the dinosaurs could not survive. Mammals actually flourished and diversified after the extinction of the dinosaurs.