2.Identification And Taxonomy Flashcards
How could a sample be identified?
- Classification guides
- Using biological Keys
- Analysis of DNA or protein
What is taxonomy?
It involves the identification and naming of organisms and their classification into groups based on shared characteristics.
What is Classic Taxonomy based on?
Based on morphology (the external and internal structures of the organisms)
What is phylogenetics?
The study of the evolutionary history and relationships among individuals or groups of organisms.
What heritable traits does phylogenetics use to make inferences about an organisms evolutionary history?
- morphology
- DNA sequences
- protein structure
What is created using information on morphology, DNA sequences and protein structure?
Phylogeny (or phylogenetic tree) a diagrammatic hypothesis of its relationships of its relationships to other organisms
What is evolution?
Evolution is the change over time in the proportion of individuals in population differing in one inherited traits.
What is divergent evolution?
When species from a common ancestor evolve differently e.g. elephant and mammoth
(Related species become dissimilar over time)
What is convergent evolution?
When species that have evolved from different ancestries develop similar structures e.g. birds and bats
(Unrelated species become more similar overtime)
What are Chordates?
Sea squirts and vertebrates such as fish, amphibians, reptiles, birds & mammals
What are arthodpods?
Jointed legged invertebrates, segmented body typically with paired appendage.
What are nematodes?
Round worms
What are model organisms?
Those that are easily stuffy I’d have been well studied.
West are indicator species?
Species which by their presence, absence or abundance indicate the level of pollution.
What would indicate if a species is susceptible to some factor in the environment?
Absence or reduced population
