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30 terms


The mechanisms of evolution. What is evolution? How has evolution lead to the current diversity of organisms?
organisms belonging to a group of organisms that having common characteristics and are capable of mating with each other
Characteristics that an offspring inherits from its parents.
Aquired Characteristics
a driving force in the evolution of a species that favors changes according to environmental conditions
Natural Selection
New organisms produced by a living thing, the product of the reproductive processes of an animal or plant
Rigorous and systematic formulation of the principles of science, philosophy, or any other form of knowledge
Is the evolutionary process whereby an organism becomes better able to live in its habitat or habitats
to receive (a characteristic) from one's parents by genetic transmission
Is the proof used to reveal a theory.
the variety or variability of living organisms in an environment
the area or natural environment where an organism or community live
The process through which a new species is born.
A gradual process in which something changes into a different and usually more complex or better form.
The genetic characteristics that distinguishes us from others.
The simultaneous demand by two or more organisms for limited environmental resources, such as nutrients, living space, or light.
A natural or artificial process that favors or induces survival and perpetuation of one kind of organism over others that die or fail to produce offspring.
reduction of alleles in a population (resulting from a disaster that drastically reduces population size).
Genetic Drift
A change of the DNA sequence within a gene or chromosome of an organism resulting in the creation of a new character or trait not found in the parental type.
the gain or loss of alleles from a population by the movement of individuals (immigration or emigration).
Gene flow
The collective genetic information contained within a population of sexually reproducing organisms.
Gene pool
changes in the gene pool of a population over time which result in relatively small changes to the organisms in the population — changes which would not result in the newer organisms being considered as different species.
changes in organisms which are significant enough that, over time, the newer organisms would be considered an entirely new species.
Differences among individuals in the composition of their genes or other DNA segments
genetic variation
the irreversible disaearance of a population or species
A complex molecule containing the genetic information that makes up the chromosomes
A theory that describes how organisms change over many generations.
Theory of Evolution
Structures that do not have a common evolutionary origin but are similar in function
analogous structure
Structures in different species that are similar because of common ancestry.
homologous structure
The comparison of body structures and how they vary among species
comparative anatomy
Grouping of organisms based on their physical traits and similarities in DNA.
biological classification
Branch of biology concerned with identifying, naming and classifying species