Flashcards in Lecture 33 - Vertebrates I Deck (17):
1
what are amniotes?
group of tetrapods whose living members are the reptiles (including birds + mammals)
2
what are 3 terrestrial adaptations?
1. Relatively impermeable skin
2. Rib cage allows for ventilation
-Point of attachment to expand and collapse lungs
3. Amniotic egg
3
3 key characteristics of the amniotic egg
1. Evolved shelled egg that retains water, laid in dry place
2. Bird eggs calcareous shells (inflexible)
3. Reptile eggs leathery eggs (flexible)
4
What is a key feature of the amniotic egg?
Extraembryonic membranes
5
What are 3 functions of extraembryonic membranes?
1. gas exchange
2. waste storage
3. transfer of stored nutrients to embryo
6
Reptilia (body 2)
1. Rib cage ventilation,
2. waterproof keratin scales
7
Reptilia (heat source)
-ectothermic (all reptiles aside from birds)
-endothermic (birds)
8
Reptilia
tuataras, lizards, snakes, turtles, crocodilians
9
2 sublcasses of Reptilia?
1. parareptiles
2. diapsids
10
2 characteristics of parareptiles
1. EXTINCT; first major group to emerge
2. Serve as start of reptilian class
3. Large, stocky, quadrupedal herbivores
11
what are the 2 major lineages of diaspids?
1. lepidosaur
2. archosaur
12
lepidosaur (EX)
tuataras, lizards, snakes
13
3 characteristics of lepidosuars
1. loose jaw
2. venom
3. chemical + heat sensors
14
archosaurs (EX)
turtles, crocodilians, pterosaurs, dinosaurscretaceous mass extinction, birds
15
9 characteristics of bird/archosaurs
1. wings
2. one ovary
3. loss of teeth gizzard
4. endothermic
5. large brain
6. lack of urinary bladder
7. small gonads
8. hollow bonds
9. 4 chambered heart
16
______ are most numerous/diverse reptiles apart form birds
squamates
17