Biodiversity Flashcards
What is a species
similar organisms that can reproduce to give fertile offspring
what is courtship behaviour
behaviour exhibited to attract organisms of the same species for mating
How does courtship behaviour increase mating success and survival of offspring
organisms display behaviour when sexually mature and fertile
rituals form a pair bond to ensure offspring has a healthy upbringing
allows females to select a strong and healthy male
what is the Phylogenetic classification system and how can it be used
a system that arranges species in groups based on evolutionary origins and relationships
can be used to determine how closely related different species are
shows all organisms have evolved from shared common ancestors
What is a hierarchy
smaller groups within larger groups with no overlap in between
Order of the taxa
Delicious Domain
King Kingdom
Crawn Phylum
Curry Class
On Order
Friday Family
Good Genus
Stuff Species
How are species named
“Genus species”
(Genus capital letter species lower case)
What is a habitat
the range of physical, biological and environmental factors that a species can live in
What does species richness mean
The number of different species in a community
What does the index of diversity show
The relationship between the number of species in a community and the number of individuals in each species
index of diversity formula
D = N(N-1) / sum of (n(n-1))
N is total number of all organisms
n is total number of organisms of each species
How is biodiversity reduced by farming techniques
Monocultures such as wheat reduce species diversity
Ploughing
crop spraying with pesticides, fungicides and insecticides
Techniques to balance biodiversity and farming
leave uncultivated strips of land alongside hedgerows to provide a food source and habitats
delayed harvesting of crops - allows seed dispersal
4 ways to measure genetic diversity
frequency of observable/ measurable characteristics
DNA sequence
mRNA sequence
Amino acid sequence
Why is sampling important and what are the two properties for a fair sample
they are taken as it would be very difficult to record data for every individual in the population
samples must be large for it to be representative
sampling must be random to avoid bias
