Biology

6. first eukaryotes evolved from 1 prokaryote living within another
7. single species or multiple species die out
12. organisms on Earth have been changing as seen in preserved organisms Convergent evolution-organisms under similar environmental pressures evolve similarly
13. inner most layer-digestive system, trachea, lungs
14. early stage of embryonic development, occurs after fertilization of egg + formation of zygote
16. organisms have unused organs or structures
17. same structures can evolve for different uses depending on environmental demand
19. single species or group diversifies into many distinct forms
21. outermost layer-skin, hair, nails
22. different structures can evolve to fulfill similar demands based on environmental demands

1. major group of animals characterized by their embryonic development Derived character - feature present in organism that was absent in last common ancestor group Protostome - characterized from embryonic development - phyla
2. 2 species living in close proximity evolve in response to each other
3. genus species used to make scientific name for organism
4. master control gene, determines placement and activation development in organism clocks- Randomocks-random mutations accumulate over time at a consistent rate-# of mutations differences can be used to predict when an evolutionary split occurred
5. small changes in a population
8. early stage of embryonic development - follows Blastula - formation of the layers, Ectoderm - mesoderm - endoderm Zygote - initial cell formed after fertilization of egg
9. small changes over time compound into large changes
10. section Binomial nomenclature-tries to show ancestry
11. long periods of equilibrium interrupted by rapid change
15. middle layer in germ layer-gives variety of structures in body
18. study of embryos and their development, formation, growth, development
20. a scientific naming system used to identify organisms