Definitions Flashcards
How can biodiversity in a community be measured?
using species richness and an index of diversity
What is Genetic diversity
the number of different alleles of genes in a population.
Genetic diversity is a factor enabling natural selection to occur.
How to tell if two organisms belong to the same species
if they are able to produce fertile offspring.
What does a phylogenetic classification system attempt to do
attempts to arrange species into groups based on their evolutionary origins and relationships.
It uses a hierarchy in which smaller groups are placed within larger groups, with no overlap between groups.
What size is biodiversity?
can relate to a range of habitats, from a small local habitat to the Earth.
What is species richness
a measure of the number of different species in a community.
What is the index of diversity
describes the relationship between the number of species in a community and the number of individuals in each species.
What is the genotype
the genetic constitution of an organism.
What is the phenotype
the expression of this genetic constitution and its interaction with the environment.
What is a population
a group of organisms of the same species occupying a particular space at a particular time that can potentially interbreed.
3.7.3Evolution may lead to speciation (A-level only)
What is an ecosystem
A community and the non-living components of its environment together.
Ecosystems can range in size from the very small to the very large.
What is a community.
Populations of different species
What is a niche?
Within a habitat, a species occupies a niche governed by adaptation to both abiotic and biotic conditions
What is the carrying capacity
An ecosystem supports a certain size of population of a species,
called the carrying capacity
Where dos a niche happen
Within a habitat
