Evolution Flashcards
Members if each species compete to obtain food living space and necessities of life
Struggle for existence
Change in a kind of organism
Evolution
Ability of an individual to survive in reproduce in its environment
Fitness
Any inherited characteristics that increases and organisms chance of survival
Adaptation
Process by which individuals that are better suited to their environment survive and reproduce most successfully; otherwise known as natural selection
Survival of the fittest
Principle that each living species has descended with changes from other species overtime
Descent with modification
All things are derived from common ancestors
Common descent
Structures that have different mature forms the different organisms but develop from the same embryonic tissues
Homologous structures
Structures with similar functions that did not come from sharing a common ancestor, but from sharing a similar environment
Analogous structures
A organ that serves no useful function in an organism
Vestigial organ
Combined genetic information of all the members of a particular population
Gene pool
Form of natural selection in which the entire curve moves; occurs when individuals at one end of the distribution curve have higher fitness than individuals in the middle or at the other end of the curb
Directional selection
The type of selection which occurs when individuals near the center of the curve are favored
Stabilizing selection
Form of natural selection in which a single curves with into two; occurs when individuals at the upper and lower inns up a normal distribution curve have higher fitness than those need the center of the curve
Disruptive selection
A random change in allele frequencies that occurs in small populations
Genetic drift