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DNA VOCAB
vocab related to DNA
29
Biology
11th Grade
02/23/2010

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Term
Vestigial Organs
Definition
structures that serve no purpose or function in an organism
Term
Fossil
Definition
preserved remains or evidence of an ancient organism
Term
Adaptive Radiation
Definition
process, also known as divergent evolution, in which one species gives rise to many species that appear different externally but are similar internally
Term
Homologous Evolution
Definition
evolution in which parts of different organisms, often quite dissimilar, that developed from the same ancestral body parts
Term
Analogous Structures
Definition
structures that are similar in appearance and function but have different origins and usually different internal structures
Term
Divergent Evolution
Definition
pattern of evolution, also known as adaptive radiation, in which one species gives rise to many species that appear different but are similar internally
Term
Convergent Evolution
Definition
phenomenon in which adaptive radiations among different organisms produce species that are similar in appearance and behavior .....opposite of divergent evolution
Term
Reproductive Isolation
Definition
Separation of population as that they do not interbreed and produce fertile offspring (weaker organisms)
Term
Speciation
Definition
how new species evolve from old ones
Term
Variations
Definition
Differences
Term
Environment
Definition
surrounding things, conditions or influences
Term
Natural selection
Definition
process in nature that results in the most fit organisms producing offspring
Term
Artificial Selection
Definition
technique in which the intervention of humans allows only selected organisms to produce offspring
Term
Adaptation
Definition
process that enables organisms to become better suited to their environments
Term
Asexual Reproduction
Definition
process in which a single organism produces a new organism or organisms identical to itself
Term
Chromosomal mutation
Definition
change in the number or structure of chromosomes in a cell
Term
Darwin
Definition
Scientist that invented the theory of evolution
Term
Evolution
Definition
process by which modern organisms have descended from ancient organisms; any change in the relative frequencies of alleles in the gene pool of population
Term
Embryology
Definition
the study of organisms in the early stage of development
Term
Fitness
Definition
combination of physical traits and behaviors that help an organism survive and reproduce in its environment
Term
Gene pool
Definition
Common group of genes shared by members of a population
Term
Genetic Drift
Definition
random change in the frequency of a gene
Term
Geology
Definition
they study of the physical history of the Earth
Term
Gene mutation
Definition
change involving the nucleotides of DNA
Term
Gene
Definition
segment of DNA that codes for a particular protein
Term
Mutation
Definition
Change in the genetic material of a cell
Term
Sexual Reproduction
Definition
process in which two cells, normally from different individuals, unite to produce the first cell of a new organism
Term
Species
Definition
group of organisms that share similar characteristics and can interbreed with one another to produce fertile offspring
Term
Survival of the Fittest
Definition
principle that states that only individuals with characteristics best suited to their environment survive the struggle for existence
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