Archaeopteryx - ✔✔intermediate fossil that shows both reptile and bird characteristics
|| || || || || || || || || ||
Phylogenetic constraint - ✔✔The fact that the legacy of human evolutionary past limits the
|| || || || || || || || || || || || || ||
course of further evolution and results in seemingly suboptimal structures.
|| || || || || || || || ||
Homology - ✔✔similarity resulting from common ancestry
|| || || || || ||
vestigial structures - ✔✔remnant of a structure that may have had an important function in
|| || || || || || || || || || || || || || ||
a species' ancestors, but has no clear function in the modern species.
|| || || || || || || || || || ||
Anagenesis - ✔✔species formation without branching of the evolutionary line of descent.
|| || || || || || || || || || ||
cladogenesis - ✔✔Branching evolution occurs when a new species branches out from a
|| || || || || || || || || || || || ||
parent species
||
Atavistic features - ✔✔reappearance of a trait lost in evolution
|| || || || || || || || ||
adaptive radiation - ✔✔the diversification of a group of organisms into forms filling
|| || || || || || || || || || || || ||
different ecological niches.
|| ||
biotic factors - ✔✔competition, predation, disease
|| || || || ||
abiotic factors - ✔✔climate, topography, habitat
|| || || || ||