Natural Selection And Genetic Modification Flashcards
Defintion of VARIATION
Organisms of the same species ba s differences
Definition of EVOLUTION
Is a gradual change in the characteristics of a species iver time
How has bacteria demonstrated evoultion?
- bacteria with and without antibiotic resistant alleles are exposed to antibiotic
- survival stage/ resistant bacteria more likely to survive non resistant bacteria dies
- resistant alleles becomes more common in population
Main charcteristics of animal- kingdom
- multicellular
- have nuclei
- no cell walls
Oldest to youngest
Homo habilis
Homo erectus
Homo sapians
Main characteristics of plants- kingdom
- muliticellular
- have chloroplasts for photosynthesis
- cells have nuclei
- cellulose cell walls
Main characteristics of fungi- kingdom
- multicellular
- live in or on the dead matter that they feed on
- cells have nuclei
- crll walls contain chitin
Main characteristics of protists- kingdom
- mostly unicellular
- cells have nuclei
- some have cell walls
Main characteristics of Prokaryotes- kingdom
- unicellular
- cells dont have nuclei
- flexible cell walls
ARCHAEA- domain
Cells with no nucleus but genes with unused sections of dna
BACTERIA- domain
Cells with mo nucleus but no unused sections of dna is present
EUKARYA- domain
Cells with a nucleus and genes with unused sections if dna
Advantages of selective breeding
+ econmically viable
+ larger yeild
+ pet characteristics
Disadvantages of selective breeding
- ethical implications
Genetic modification advantages
+ less painful method if delivery medicine
+ larger yield
+ increase size
+ quicker than selective breeding
