Untitled Flashcards Set

What class do birds belong to in Linnaean classification?

Class Aves

Dinosaurs are defined as __________.

archosaurian diapsid reptiles

On a cladogram, Diapsid, Reptilia, and Archosaurian are all __________.

nodes

The three major skull types of amniotes are Anapsid, Synapsid, and __________.

Diapsid

Dinosaurs need these five identifying features to be considered dinosaurs: hip structure, hole in pelvis, upright posture, legs held __________, and fused vertebrate.

underneath body

What is the joint type that dinosaurs have that only moves forward and backward?

Hinge-like ankle

In which time period should we search for the ancestors of dinosaurs?

Middle Triassic rocks

What catastrophic event occurred 66.1 million years ago affecting dinosaurs?

An asteroid hit the earth

List one of the things that went extinct during the mass extinction event.

All terrestrial dinosaurs

Which group of animals survived the mass extinction event?

Turtles

What are the three hypotheses for the extinction of the dinosaurs?

Impact from meteor/asteroid, volcanic activity, disease/predation/competition.

How long did it take for the oceans to recover after the extinction?

A few thousand years

What is one characteristic of mammals?

4 chambered heart

What are the three types of modern mammals?

Monotremes, Placentals, Marsupials