Diversity and classification
- Created by: Eshe Jones
- Created on: 14-05-19 12:48
View mindmap
- Diversity and Classification
- Classification
- Phylogeny
- the stidy of the evolutionary history of groups of organisms. Tells us how closely related species are
- phlogenetic tree
- common ancestors are shown where branches diverge
- Taxonomy
- the science of classification
- organising animals into groups
- 8 taxa
- Domain
- kingdom
- phylum
- class
- species
- genus
- family
- order
- the science of classification
- Binomial System
- nomenclature - naming system
- first part is Genus second part is species
- allows communication between scientists without confusion
- Phylogeny
- Courtship
- Carried out by organisms to attract a mate of the correct species
- species specific
- simple courtship behaviour
- Releasing a chemical
- using sound
- visual displays
- Complex courtship behaviour
- dancing
- building
- can be used for classification
- the more similar the behaviour the ore closely related the species
- prevents interbreeding
- reproduction more successful
- DNA technology
- genome sequencing
- comparing DNA base sequences
- represented via a percentage
- comparing amino acid sequences
- amino acids make polypeptide chains which are coded for by DNA bases
- Immunological comparson
- similar proteins will bind to the same antbodies
- increases accuracy of measuring genetic diversity
- previously genetic diversity was measured by observational differences such as eye colour
- genome sequencing
- Variation
- caused by genetic and environmental factors
- population samples
- too time consuming/ impossible to catch all individuals
- random sample
- avoid bias
- random number generator
- representative of whole population
- bodiversty
- the variety of living organisms in an area
- local biodiversity
- biodiversity of a habitat such as a pond
- global diversity
- the variety of species on earth
- species richness
- the number of different species
- index of diversity
- d=N(N-1)/ En(n-1)
- agriculture
- farmers maximise crop production via methods which reduce biodiversity
- woodland clearance
- directly reduced type/number of species
- destroys habitats and food sources
- hedgerow removal
- destroys habitats and food sources
- directly reduced type/number of species
- pesticides
- kills animals which eat crops, reducing that species and those who feed off those pests
- herbicides
- kills plant species and affects those who feed off that weed
- monoculture
- only on type of plant grown
- supports fewer organisms
- woodland clearance
- conservation schemes
- aim to increase biodiversity
- farmers maximise crop production via methods which reduce biodiversity
- Classification
Comments
No comments have yet been made