Exam 20: Reptiles: Diapsid Amniotes

Lizards and snakes may lose their tails to escape from predators,this process is known as

The common ancestor of mammals and reptiles had a(n)_________ skull.

Many lizards possess glands associated with the eyes.These glands function along with the excretory system in ridding the body of excess ________.

__________ are used to analyze odor molecules brought into a snake's mouth by its forked tongue.

The ventricular septum of the heart is complete only in the _________ reptiles.

The skin of reptiles

Which of the following is a venomous lizard?

All modern reptiles (including birds)are members of the _______ lineage.They are derived from ancestors that had upper and lower openings in the temporal region of the skull.

The evolution of the synapsid amniote lineage resulted in modifications of the jaws and teeth,the incorporation of 2 more bones into the middle ear (in addition to the stapes),and elongation of legs to hold the body higher off the ground.This lineage includes modern-day _________.

Enlargement of cerebral hemispheres in reptiles is associated with

According to cladistics interpretations,the traditional class Reptilia is a paraphyletic assemblage because it excludes this group of animals.

The amniotic membranes may be considered to be a(n)__________ distinguishing reptiles,birds,and mammals from other vertebrates.

Which of the following is NOT a characteristic of reptiles?

Sea turtles utilize ________ as an aid to navigation to nesting beaches.

Early members of the reptiliomorph lineage were the first to produce

Reptiles that are usually solitary may migrate to common sites called __________ to spend the winter.

Among reptiles,a form of asexual reproduction known as __________ has been described in six families of lizards and one species of snake.

In the archosaur lineage,the evolution of the skull led to an elongated snout and the formation of a _____________ that separates the nasal and mouth passageways.This structure is best developed in modern crocodiles.

All extant reptiles are members of the Diapsida; however,one group of reptiles has secondarily returned to the anapsid skull condition.Which group of extant reptiles has an anapsid skull?

The skin of amphibians is an adaptation to their "double life." The skin of reptiles is an adaptation to life apart from water.All of the following pairings help explain why the former statement is true except one.