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Unit 5 - Adaptations

TermDefinition
dichotomous key a tool used to identify organisms in nature using observations and a series of questions
trait a physical characteristic or quality of an organism
adaptation an inherited trait that allows an organism to survive and reproduce in its environment
genetic variation the differences in traits among species
natural selection organisms gradually change over time
selective breeding also called artificial selection
selective breeding people select a trait from an organism to be passed on - deliberate breeding
Charles Darwin developed the Theory of Natural Selection - how organisms change over time
structural adaptation also called physical adaptation
structural adaptation the external physical feature (body part) of an organism that helps it survive in its habitat
behavioral adaptation an activity, action or behavior that an organism does to help it survive in its habitat
phloem the internal tissue of a plant that carries sugar and organic substances throughout a plant - up and down
xylem the internal tissue of a plant that carries water upward from the roots to every part of the plant
mutation changes in the genetic code that lead to different traits appearing
mimicry an adaptation that allows animals to look like another organism to avoid predators
learned behavior a behavior that has been learned from experience or observation
trait a characteristic that an organism can pass on to its offspring through its genes
camoflauge an adaptation that allows an organism to blend in with its environment
hibernation a period of inactivity that some animals experience in winter that allows them to survive on stored body fat
migration an animals movement to a new location in a regular pattern
taxonomy the naming and classifying organisms based on characteristics
scientific name the Latin name given to an organism, consisting of two words - a genus and species
Homo sapien the scientific name for a human
couplet in a dichotomous key - consists of two description choices which should lead you to the correct answers
species organisms with similar characteristics that can produce offspring when they mate
internal adaptation an adaptation inside the body - fish gills, bird's hollow bones, plant xylem
gills an internal adaptation that allows fish to get and use dissolved oxygen from the water they are in (breathe)
Created by: Blackcat8765
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