Term
| Amniote Egg (Yolk sac + 3 membranes) & Significance |
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Definition
Yolk sac plus 3 membranes
1. Amnion: Fluid that cushions embryo
2. Allantois: Waste elimination + Respiration
3. Chorion: Respiration
Significance of this egg was that it developed dermal and epidermal scales to prevent it from drying (Innovation for land dwelling) |
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Term
| Reptilia: 3 main lineages |
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Definition
1. Chelonia
2. Lepidosauria
3. Archosauria |
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Term
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Definition
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Term
| Lepidosauria - Two types & examples |
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Definition
Squamata (Lizards, snakes, geckos, chameleons, skinks)
Sphenodon (Tuartara) |
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Term
| Archosauria -Two types and examples |
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Definition
Crocodylia (Crocodiles, alligators)
Aves (Birds) |
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Term
| Squamata (snake) characteristics |
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Definition
-Limbless
-Carnivorous
-venomous (rattlesnake) -has heat sensitive pits - nerve endings - teeth modified as fangs
-nonvenomous (Python) - uses constriction |
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Term
| Why is Tuartara a conservation priority? |
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Definition
-Living fossil
-Only 2 species in lineage |
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Term
| Snapomorphies for Archosauria |
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Definition
1. 4 chambered heart
2. Nest Building
3. Parental Care
4. Legs Under Body |
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Term
| Benefits of a 4-chambered heart |
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Definition
-Oxygen rich blood separated from Oxygen poor blood
-Oxygen delivery enhanced: Important for endotherms since need more oxygen per body weight than other vertebrates of equal size |
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Term
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Definition
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Term
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Definition
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Term
| Evidence that Dinosaurs were warm blooded (endothermy) |
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Definition
-Limb morphology (Legs under body)
-Dinosaur relatives - Birds unquestionably warm blooded therefore likely dinos were too |
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Term
| Evidence that Dinosaurs were cold blooded (ectothermy) |
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Definition
| -Dinosaurs lack respiratory turbinates (narrow ectotherm-like nasal passages |
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Term
| Extinction of Dinosaurs caused most likely by _____ and evidence |
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Definition
-Asteroid/Bollide Impact
-Thin layer of iridium that separates sediments from the Mesozoic and Cenozoic eras
-Iridium is very rare on earth but common in extraterrestrial objects that fall to earth
-Extinction effects larger vertebrates more |
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