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Bio Anth - Chapter 1
N/A
14
Anthropology
Undergraduate 1
01/24/2012

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Term
Adaptation
Definition
an evolutionary force that creates features of an organism that help it survive/reproduce and are created through evolution by natural selection
Term
Mimic
Definition
shares appearance of model
Term
Batesion Mimicry
Definition
adaptive if model is venomous and mimic is non-venomous
Term
Directional Selection
Definition
changes the average value of a trait
Term
Stabilizing Selection
Definition
normalizes trait to equilibrium
Term
Disruptive Selection
Definition
creates bi-modal variation in trait
Term
Natural Selection
Definition
traits that confer advantages in survival and reproduction are retained in the population and traits that are disadvantageous disappear
Term
Morphology
Definition
an organism's size, shape & composition
Term
Equilibrium
Definition
an average
Term
Fecundity
Definition
ability to produce offspring
Term
Convergence
Definition
the evolution of similar adaptations in unrelated groups of animals
Term
Placental Mammals
Definition
nourish their young in the uterus during long pregnancies
Term
Marsupials
Definition
non-placental mammals that rear their young in external pouches
Term
Blending Inheritance
Definition
a model of inheritance that assumes the mother & father each contribute a hereditary substance that mixes to determine the characteristics of the offspring
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