+
Related Flashcards
Related Topics
Cards In This Set
| Front | Back |
|
What are the four sources of genetic variation in a larger group?
|
Mutation, immigration or emigration, gene recombination, genetic drift
|
|
Describe the Jawless Fishes (Agnatha)
|
No true teeth, fiber/cartilage internal skeleton, gills, swims with no fins
|
|
Chondrichthyes (Cartilaginous Fishes)
|
Bone like teeth scales on skin, interaly cartilage skeleton, gills, swims with fins
|
|
Bony Fishes (Osteichthyes)
|
Bones, "ray fins", internal bony skeleton, gills, swims with fins
|
|
Amphibians
|
Limbs, lungs, internal bony skeleton, breathes through lungs and skin, swims and hops
|
|
Reptiles
|
Dry scaly skin, soft egg shell, internal bony skeleton, lungs, and crawls, slithers
|
|
Birds
|
Feathers, wings, hard shells, with internal bony skeleton, lungs, flies or runs
|
|
Mammals
|
Mammary glands, live birth, internal bony skeleton, lungs, varies
|
|
Precambrian
|
Eukaryotes, prokaryotes existed
|
|
Paleozoic
|
Algae, fungi, moss, marine inverts, fish existed
|
|
Mesozoic
|
Reptiles, dinosaurs, ferns, and conifers existed
|
|
Cenozoic
|
Mammals, flowering plants
|
|
Genetic Variation
|
Overtime indiiduals mate and genes begin to change due to mutations
|
|
Competition
|
Forces the formation of new subpopulations
|
|
Environmental Pressure
|
Something in the environment changes
|
