P. Chordata - Cl. Reptilia

Question 1

What are Reptiles directly derived from?

Answer 1

Amphibians!

Question 2

What two classes did reptiles give rise to?

Answer 2

Aves and Mammalia

Question 3

How did reptiles come to lay eggs?

Answer 3

They are derived from a class for Amphibians that laid amniotic shelled eggs that are now extinct.

Question 4

List the 5 Terrestrial adaptations of reptiles:

Answer 4

1) Skeletal improvements
2) Tough, scaly skin
3) Internal respiration surface
4) internal fertilization
5) Amniote egg

Question 5

What are the skeletal adaptations and functions?

Answer 5

The vertebrae are larger in size and number which makes the backbone more capable of supporting the body weight.

Then they have a strength in girdle.

Question 6

What is the advantage and disadvantage of having tough, scaly skin?

Answer 6

The scaly skin prevents water loss but they do not have cutaneous respiration.

Have to use their mouth to cool themselves off.