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17 Cards in this Set
- Front
- Back
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What are some facts (numbers) associated with the Class Osteichthyes?
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1. 25,000 species
2. 50% of all vertebrate species 3. 58% marine |
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What are 5 characteristics of the class Osteichthyes?
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1. bony skeleton
2. thin, overlapping scales 3. gill covered by an operculum 4. mouth terminal 5. 50% of this class of fish have a swim bladder |
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What are the 5 different shapes of bony fish?
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1. laterally compressed
2. dorsoventrally compressed 3. elongated, eel-like 4. short body or anteroposterically compressed 5. sea horses |
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What happens to the eyes of a halibut from youth to adulthood?
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The eyes of the young halibut are on the sides of the body, as they mature, they migrate to the top
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Where is a swim bladder derived from?
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The lungs
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How many chambers does a fish heart have?
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2
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What are the components of gill structure?
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1. gill filament
2. gill arch 3. gill rakers |
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What about sex for class osteichthyes?
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1. dioecious-many change sexes
2. external fertilization a. oviparous-lay eggs b. ovoviviparous- retains eggs c. viviparous |
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What are the characteristics of the Class Amphibia?
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1. 375,000,000 species
2. 1st tetrapods =amphibians 3. 1st amphibians had 3 eyes |
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What is homology?
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Structures with the same origin but may do a different function.
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What upper limb bones do all tetrapods have?
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1upper arm bone, 2 lower arm bones, carpals, and fingers.
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What is analogy?
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Same function, different origin. Ex. Birds wings, and insect wings
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What are the characteristics of Class Amphibia, Order Apoda/Gymnophiona?
And what do those names mean? |
Apoda="no foot"
gymnophiona="naked snake" 1. tropical burrowers 2. internal fertilization 3. blind or tiny eyes |
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What are the characteristics of the Class Amphibia, Order Urodela/Caudata?
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1. salamanders
2. breath through external gills 3. internal fertilization (male drops sperm, female takes it inside 4. Respiration: a.lungs b.external gills c.buccopheryngeal (breathes through throat) d. skin 5. some lack a larval stage |
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What are the characteristics of the Class Amphibia, Order Anura/Salienta? And what do those names mean?
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Anura= "without a tail"
Salienta= "to hop" 1. have larval stages, pollywogs and tadpoles 2. External and internal gills 3. tadpole herbivorous, eats algae 4. leaping, hopping, saltation (as kangaroo and toads) 5. No marine amphibians |
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Where do frogs and toads NOT occur?
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New Zealand, oceanic islands, and southern S. America
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What are 6 possible reasons that early tetrapods left water?
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1. Escape an aquatic predator?
2. Ambush predator in pond "weed"? 3. Walk on bottom? 4. Fed on terrestrial insects? 5. Laid eggs on land? |
