Topic 3 Classification And Biodiversity Flashcards
4 eukarya kingdoms
Animalia
Plantae
Fungi
Protoctista
3 facts about Plantae
- autotrophs
- contain chlorophyll for photosynthesis
- cellulose cell walls
3 facts about Fungi
-saprophytic
- chitin cell wall
- reproduce by spores
3 facts about Animalia
- heterotrophic
- capable of whole body movement
- no cell walls
What are Protoctista ?
- diverse group of eukaryotes that cannot be classified as animals, plants or fungi.
What are autotrophs?
Plantae
Make their own food
What are heterotrophs?
Animalia
They eat others for food
What are saprophytes?
Fungi
Live off dead organisms using extra cellular digestion
What are the Taxonomic groups?
D Keep Ponds Clean Or Froggies Get Sick / Daddy King Philip Came Over For Great Sex
Domain Kingdom Phylum Class Order Family Genus Species
What is the definition of a species?
A group of organisms with similar characteristics that interbreed to produce fertile offspring
What is sexual dimorphism?
Male and female look very different
Have different physical features
What are morphological species?
Organisms categorised together as a species based on their physical features
Advantage of morphological species?
Easy
Disad of morphological species
Problem of sexual dimorphism
Limitations of species models?
- Need to find evidence
Rare to see them mating/ Expensive to setup sreeding programs - Seperate species can produce fertile offopring
- mary organismes dont reproduce sexually
- fossil organism, cannot reproduce but need to be classified
What is a phylogeny
Study of evolutionary relationships
Closeness of relationship between organisms which create an evolutionary tree
What is the redefined species definition? Based on …
- structural and biochemical resemblance
- capability to interbreed and produce fertile offspring
- they do NOT interbreed w other species
What are the 3 domains
- bacteria
- eukaryotes
- archaea
How are scientific ideas evaluated? (3 mark)
- peer reviewed by other scientists
- scientific findings published
- idea presented at scientific conference
(- repeat experiments to validate results)
(- sharing on the media, internet)
What are the biochemical differences between domains?
Cell wall compositions
Peptidoglycan in bacteria