Unit 12

Front 1

Evolution

Back 1

the process by which different kinds of living organisms are thought to have developed and deversified from earlier forms during the histiry of the earth

Front 2

Relative dating

Back 2

is the science of determining the relative order of past events without neccesarily determining their absolute age

Front 3

Radioactive dating

Back 3

is a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they formed

Front 4

Comparaitive anatomy

Back 4

is the study of similarites and differences in the anatomy of different species

Front 5

Homologous structures

Back 5

is an example of an organ or bone that appears in different animals, underlining anatomical commonalities demonstrating descent from a common ancestor

Front 6

Analogous structures

Back 6

pertain to the various structures in different species having the same apperance, structure or functionbut have evolved seperatly, but the don't share a common ancestor.

Front 7

Vestigial structures

Back 7

a structure in an organism that has lost all or most of its origianl function in the course of evolution, such as human appendixes

Front 8

Comparative embryology

Back 8

is the branch of embryology that compares and contrasts the embryos of different species

Front 9

Comparative biochemistry

Back 9

it is the study of the similarites and differences between different living organisms

Front 10

Theory of use & disuse

Back 10

is the idea that an organism can pass on characteristics that it has acquired during its lifetime to its offspring

Front 11

Inheritance of acquired characteristic

Back 11

is a hypothesis that physiological change acquired over the life of an organism

Front 12

Adaptations

Back 12

the action or process of adapting or being adapted

Front 13

Natural Selection

Back 13

the process where by organisms better adapt to their environment tend to survive and produce more offspring

Front 14

Speciation

Back 14

the formation of new and distinct species in the course of evolution

Front 15

Genetic recombination

Back 15

is the production of offspring with combinations of traits that differ from those found in either parent

Front 16

Immigration

Back 16

the action of coming to live perminetly in a forgien country

Front 17

Punctuated equilibrium

Back 17

the hypothesis that that evolutionary development is marked by isolation episodes of rapid speculation between long periods of little or no change

Front 18

Industrial melanism

Back 18

the prevalence of dark-colored varieties of animals in industrial areas where they are better camouflaged against predators than paler forms

Front 19

Bacterial resistance

Back 19

is the capacity of bacteria to withstand the effects ofantibiotics or biocides that are intended to kill or control them