BIO; Species & Taxonomy

define species

2 organisms belong to the same species if theyre able to breed and make fertile offspring

how can a species survive

ensure survival of offspring;

• form a pair bond (where parents stay together)

• choose a strong and healthy mate (seen in courtship behaviour)

whats courtship behaviour

different behaviours that male animals demonstrate to attract a mate

each species displays its own unique behaviour for successful mating;

involves a sequence of dance moves/sounds/release of pheromones/fighting

so females observe and decide to mate and reproduce

importance of courtship

ensures successful reproduction;

enables them to recognise members of their own species and opposite sex

whats the binomial system

2 name system that leads to phylogenic classification

1. genus 2. species

whats the phylogenetic classification system

attempts to arrange species into groups based on their evolutionary origins and relationships.

uses a hierarchy in which smaller groups are placed within larger groups, with no overlap between groups.

define phylogeny

tells us who’s closely related and how closely related species are

define hierarchy

when there’s smaller groups arranged within larger groups

and there’s no overlap between groups

whats the phylogenetic classification system

domain

kingdom

phylum

chess

order

family

genus

species

whats biodiversity

relates to a range of habitats, from a small local habitat to the Earth.

define species richness

no. of different species in a community

whats the index of diversity

relationship between no. of species in a community and no. of individuals in each species;

$D=\frac{N\left(N-1\right)}{\sum^{}n\left(n-1\right)}$ make sure your answer is between 1-10 !!!!

D = larger value of D means greater diversity of species

N= total no of organisms of all species

n = total no of organisms of a particular species