Jawless Fishes
Do jawless fish have an amniotic egg?
NO
Do jawed fish have an amniotic egg?
NO
Do amphibians have an amniotic egg?
NO
Do reptiles have an amniotic egg?
Do mammals have an amniotic egg?
YES
What traits first emerged in jawless fish?
Cranium and vertebrae
What is the economical impact of fish on the ecosystem?
Community structure, strong effects on energy and nutrient flow
What is the ecological significance of limbs in amphibians?
Adaptation for extended use of terrestrial habitat
What key characteristics do reptiles possess?
Limbs, body scales, and lungs
What key characteristics do mammals have?
Limbs, endothermy, fur, lactation, and lungs
What are key identifying traits of jawless fish?
What are key characteristics of jawed fish?
Jaws, fins, gills
What breathing organ do larval amphibians have that adult amphibians do not?
What is the importance of an amniotic egg?
Breaks ties to water and increases offspring survivorship (born at advanced developmental stage)
Primary consumers, secondary consumers, and decomposers
Sexual reproduction: dioecious primarily or exclusively
What tropic levels do jawed fish inhabit?
Primary and secondary consumers, decomposers
What trophic levels do amphibians inhabit?
Primary consumers and secondary consumers
Primary and secondary consumers, decomposers
What is the ecological significance of lactation and fur in mammals?
Lactation: extensive parental care
Fur: activity under a wide range of environmental conditions
Decomposers and secondary consumers (ectoparasites of jawed fish)
What is the importance of jawed fish to human welfare?
Economically important food resources-many species harvested at unsustainable rate
What is the importance of amphibians to human welfare?
Biological control agents of pests, biological indicators of environmental degradation
How are reptiles important to human welfare? (Give 2)
Economically important food resource, biological indicator of environmental degradation, and biological control agents of pests
Economically important food resource, biological control agents of pests (bats), and vectors of human pathogens