Exam 20: History of the Vertebrates

Amphibians gave rise to the successful land dwellers,the _____________,about 300 million years ago.

What is the function of the operculum?

Choose the key characteristic that allowed amphibians to successfully invade land.

The very first vertebrates were:

Whales and dolphins have a few hairs on their snouts.

What is the explanation for the mass extinction episode that brought about the demise of the dinosaurs?

For over ______ years,dinosaurs dominated the face of the earth.

The massive early jawed fishes were called:

Many scientists consider birds to be little more than feathered dinosaurs.

The first reptiles were the sail-toting:

Why is it that many of the animal groups that appeared in the Cambrian period have no living relatives?

Which is incorrect about sharks?

Which of these is not a characteristic of fishes?

Bony fish evolved ________________________ to help keep them afloat.

Bony fishes possess a swim bladder to:

The sixth mass extinction event is due to the activity of ____.

The first vertebrates to invade land were:

The largest living reptiles ever on earth were the _____________.

The milk-producing glands of mammals are called _____________________.

An example of a modern-day jawless fish (agnathan)is: