Chapter 26: Reptiles Flashcards
1
Q
By late Carboniferous period the amniotes (those that lay amniotic eggs) had separated into what three groups?
A
- Anapsid
- Diapsid
- Synapsid
2
Q
Describe Anapsids?
A
- no temporal openings in the skull
- only seen in turtles today
3
Q
Describe Diapsid?
A
- all other reptilian groups and birds have this skull
- two temporal openings
- include extinct reptiles such as dinosaurs and pleisosaurs
4
Q
Describe Synapsid?
A
- mammals and extinct forms of mammals like reptiles
- single temporal opening
5
Q
Differences from amphibians:
4
A
- tough, dry skin offering protection from desiccation and injury
- Amniotic egg breaks all ties with water
- stronger jaws for crushing and gripping (jaw muscles larger and longer and better arranged for mechanical advantage)
- force is in closing not in opening
6
Q
Fertilization is ?
A
internal
7
Q
In comparison to amphibians what is their circulatory system like?
A
- more efficient and higher bp
8
Q
They have better adapted?
A
- lungs
9
Q
Ex of better water conservation strategies?
A
- metanephric kidney and excrete nitrogenous wastes as uric acid which helps conserve water
10
Q
In terms of support how do they hold up to amphibians?
A
- better boy support and more efficient on land
11
Q
NS in comparison to amphibians ?
A
- more complex
- skull has one occipital condyle
- 12 cranial nerves
12
Q
What are the three orders we examined in class?
A
- Squamata
- Testudines (Chelonia)
- Crocodilia
