biodiversity and classification Flashcards
genetic diversity
-the total number of alleles in a population
population
-a group of individuals of the same species that live in the same place and are ale to breed with one another
niche of a species
-its role within the environment
-species with the same niche are able to compete with each other
evolution
-the process by which the frequency of alleles in a gene pool changes over time as a result of natural selection
gene pool
-the combination of all genes present in a population
natural selection
-a mutation leads to variation in a species by developing a new allele
-the new allele provides an advantage
-organisms with the new allele can survive and reproduce
-the advantageous allele is passed down to offspring
-this advantageous increases in frequency in the population
anatomical adaptations
-physical adaptations, either external or internal
behavioural adaptations
-changes in behaviour which improve the organism’s chance of survival
physiological adaptations
-processes inside an organism’s body that increase its chance of survival
courtship behaviour
-the ability for organisms of the same species to recognise each other
characteristics of courtship behaviour
-recognise members of their own species
-synchronise mating
-form a pair bond
-become able to breed
biodiversity
-the variety of living organisms
species diversity
-the number of different species and number of different individuals living in a community
genetic diversity
-the number of alleles in a gene pool
maintaining biodiversity
-using hedgerows instead of fences
-growing different crops in the same area, known as intercropping
-reducing the use of herbicides and pesticides
-preserving wetlands instead of draining these for farming use
