Question 1 Why did Owen regard dinosaurs as a fundamentally

Question 1

Why did Owen regard dinosaurs as a fundamentally new kind of reptile?

Question 2

Which of these is a closest relative of a pelycosaur?

Question 3

Which of the following was not included by Owen as an inaugural member of Dinosauria?

Hadrosaurus.

Iguanodon.

Hylaeosaurus.

Megalosaurus.

Question 4

Which of the following is not an archosaur?

Solution

Question No.

Answer

Explanation

Question 1

They were very ecologically diverse.

While observing the large fossil reptile bonds by Richard Owen 1842, he decided that these fossils are very different from the known reptiles, so he kept them under completely new group of giant fossil reptiles known as Dinosauria

Question 2

A monitor lizard

Pelycosaurs are mammal like reptiles and they resembled the large lizard in their overall appearance and thus scientist felt the pelycosaur is a close relative to Monitor lizard

Question 3

Hadrosaurus

Bones of Iguanodon, Megalosaurus, and Hylaeosaurus did not show resemblance with lizards, so in 1842, Owen placed them in distinct tribe or sub-order of Saurian Reptiles.

Question 4

A mosasaur

Archosaurs are a group of diapsid amniotes and the living representatives of this group consist of birds and crocodilians. Based on the characteristics we can say Mosasaurs were not archosaurs, but actually they were a type of lizard.