IB Biology Sub-topic A3.1 Definitions
This page contains our IB Biology definitions for sub-topic A3.1. By learning each one of these definitions, you will fully cover the content for IB Biology 'Further diversity'.
HL
artificial classification
Classification of species on the basis of visual observation
HL
cladistics
The study of classifying clades
HL
Dichotomous Key
A tool used for identifying organisms based on a series of choices that lead to the correct name of the given item
HL
DNA Barcodes
Short sequences of conserved DNA that are specific and unique to each species, used for species identification
gene
A heritable factor that consists of a length of DNA and influences a characteristic
HL
Invasive Species
Non-native species that spread widely in a new habitat, often causing harm to the environment, economy, or human health
HL
natural classification
Classification of species on the basis of genetic similarity
species
A group of organisms that can potentially interbreed
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