Biogeography Flashcards
(23 cards)
Study of the distribution of species and ecosystems in geographic space and through geological time.
BIOGEOGRAPHY
Isolation of population due to geographic barrier
VICARIANCE
Initial dispersal of a portion of a population leads to the diverging of the dispersed population
DISPERSAL
Suggests that today’s continents were once connected.
CONTINENTAL DRIFT
Dip in sea levels meant that land bridges became exposed
CLIMATE AND SEA LEVEL CHANGE
Movement of population away from an area.
EMIGRATION
Movement of population into an area.
IMMIGRATION
Landforms like mountains, valleys, and bodies of water
GEOGRAPHICAL BARRIERS
Geographic location where multiple species have been proven to have acquired distinct characteristics which may have led to speciation.
CENTER OF ORIGIN
Refers to the science of describing, identifying, naming, and classifying organisms.
TAXONOMY
is composed of two components: the genus name and the specific epithet
SCIENTIFIC NAMES
Evolutionary traits that are homologous within a group of organisms.
ANCESTRAL TRAITS
Present in species but are absent in ancestors or vice versa.
DERIVED TRAITS
Set of physical features. Can be external or internal morphological features that are useful for classification of organisms (Homologous).
MORPHOLOGICAL TRAITS
Refer to the set of developmental features that can be used for the classification of organisms.
DEVELOPMENTAL TRAITS
Functional features of the structures (Analogous).
PHYSIOLOGICAL TRAITS
Using specific sequences of DNA.
GENETIC TRAITS
The process of organizing organisms based on taxonomic hierarchy involves classifying them into multiple levels of the organization.
TAXONOMIC HIERARCHY
scientists primarily focus on certain morphological and anatomical characteristics that may indicate common descent.
STRUCTURAL EVIDENCE
for the relatedness of organisms involves studying molecules like DNA, RNA, and proteins.
MOLECULAR EVIDENCE
is a hypothetical relationship between groups of organisms being compared.
PHYLOGENY
a diagram that shows relationships between organisms based on characteristics.
CLADOGRAM
Also be based on physical characteristics but more commonly use data to show the relationship between organisms
PHYLOGENETIC TREE