Classification And Courtship Behaviour Flashcards
Taxonomic rank
Domain
Kingdom
Phylum
Class
Order
Family
Genus
Species
How genus and species are written
Genus= capital
Species= underlined or italics
Problems with classification techniques
- species aren’t fixed (evolution)
- may be large variation within species
- many species are extinct and there are no fossils
- some species don’t reproduce sexually
- isolated groups
Hierarchy
Groups within groups with no overlap
Phylogenetic relationship
Can show evolutionary relationships
Species definition
Organisms that can reproduce to create fertile offspring
Using protein structure
Look at amino acid structure
Closer the as sequence close h to e relationship
Protein structure relates to dna base
Using base sequence dna or mRNA
More similar base sequence DNA= closer relationship
Species diversity
The number of different species and the number of individuals of each within any community
Genetic diversity
Number of different alleles of each gene
May be low if there has been inbreeding or the population started from only a small number of individuals
Ecosystem diversity
Range of different habitats within a particular diversity
Species richness
The number of different species in a community
Biodiversity
The range and variety of genes species and habitats within a particular environment
If there are more grasses etc more habitats and greater variety of food sources
Farming impacts on biodiversity
Often reduces it
Conservation techniques
- Hedgerows and wild patches around
- organic fertilisers
- biological pesticides
- crop rotation
- nitrogen fixing bacteria
Courtship behaviour reason
- allows members of same species to recoginse each other
- stimulates release of gametes and physiolological
- allows individuals to recognise opposite genders
- indication of sexual fertility
- helps form a bond
