Classification process Flashcards
Asexual
The production of genetically identical offspring from a single parent
Bifurcation
A division into two branches. Any place where one thing divides into two.
Biotic
The living components in the environment.
Biological classification
the process of arranging organisms, both living and extinct, into groups based on similar characteristics.
Clade
a group of organisms that is believed to comprise a common ancestor and all of its evolutionary descendants
Cladograms
a branching diagram showing the evolutionary relationships between a number of species
Cladistics
a method of grouping organisms that uses evolutionary lines of descent rather than structural similarities
Competition
rivalry between individuals, of the same or different species, for a specific resource(s)
Common ancestry
the ancestor of two or more species in the later period
Density dependent factor
any factor influencing population regulation that has a greater impact as the density increases
Density independent factor
an abiotic factor (that is independent of the density of the population) that affects the size of a population
Disease
disorder of structure or function in a human, animal, or plant, especially one that has a known cause and a distinctive group of symptoms, signs, or anatomical changes.
Distribution
the position, arrangement, or frequency of occurrence (as of the members of a group) over an area or throughout a space or unit of time.
Ecological surveying
An ecological survey involves surveying an area to determine what plants, animals and communities exist in that area.
Environmental gradients
a change in abiotic (non-living) factors through space (or time).
Environmental gradients
can be related to factors such as altitude, depth, temperature, soil humidity and precipitation.
Evolution
a process that results in changes in the genetic material of a population over time.
Fertile offspring
the young can grow up to reproduce another generation.
Habitat
a specific location, with a particular set of biotic and abiotic conditions, where an organism normally lives
Hierarchical
relating to the graded organisation of grouping from general to very specific subgroups
Interspecific hybrid
The cross between animals of the same genus but different species.
K selection
K-selected species are those that are larger, have long lifespans, produce few young at a time, and exhibit logistic growth.
Linnaean system
A way of organizing living things. Linnaeus’ hierarchical categorization system has seven levels, known as taxa. Kingdom, Phylum, Class, Order, Family, Genus, and Species are the largest to the smallest.
Molecular phylogeny
a relatively new scientific discipline that involves the comparative analysis of the nucleotide sequences of genes and the amino acid sequences and structural features of proteins from which evolutionary histories and relationships, and in some cases also functions, can be inferred.