biodiversity Flashcards
what is a hierarchy
a series of large groups split into smaller groups with no overlapping.
how to classify species by courtship
by the ways the attract a mate for example by visual displays, dancing, using sounds. the more similar their courtship behaviours the more closely related they are.
what is phylogenetics
using evolutionary relationships to find out common ancestry.
advantages of using phylogenetics and not hierarchy
it is based on evolution not characteristics. allows a continuum. it shows the changes over time.
ways of classifying based on evolutionary relationships
compare base sequences in DNA. compare amino acid sequences. immunological comparison
how to compare DNA base sequences
the higher the percentage of base similarities the more closely related they species are
how to look as amino acid sequences
species that are more genetically similar will have very similar amino acid sequences meaning they are more closely related.
how to look at immunological comparisons
similar proteins should bind to similar antibodies and this means they are more closely related.
what is biodiversity
the variety of organisms living in an area
what is a stable community
one where all the species and environmental factors are balanced.
how do humans impact biodiversity
deforestation, hedgerow removal, pesticides, herbicides, monoculture
how to protect biodiversity
give legal protection to endangered species. create more areas of SSSI. schemes to encourage farmers to plant more hedges
how to make sampling random
use and random number generator to select the coordinates for quadrats.
why is it good to have a random sampling technique
to reduce bias
what type of curve should a population follow
a normal distribution curve
