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chpt 14/15
N/A
25
Biology
10th Grade
01/27/2010

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Term
species
Definition
a population of organisms that interbreeds freely and with no other populations
Term
artificial selection
Definition
breeders select for a desired characteristic
Term
evolution
Definition
process of change over time which existing populations of organisms develop from ancestral forms through modifications of their characteristics
Term
fossil
Definition
any record of a dead organism
Term
radioactive isotopes
Definition

unstable, nuclei decay at a steady rate

example: carbon 14

Term
environment
Definition
Darwin felt that organisms were shaped by their _____
Term
Galapagos
Definition
The islands taht Darwin observed many different species of organisms
Term
adaptations
Definition
characteristics taht are naturally occuring inheritable traits in a population
Term
the origin of species by means of natural selection
Definition
Name Darwin's book
Term
natural selection
Definition
organisms having adaptive traits survive in a greater numbers that those without
Term
volcanic
Definition
type of island that the Galapagos are
Term
adaptive radiation
Definition
populations of a species changes as it is dispersed within different habitats
Term
speciation
Definition
a new species forms describes
Term
ground , warbler, and tree
Definition
name the basic 3 types of finches on galapagos islands
Term
beak color size etc
Definition
name 2 characteristics that separated the finches
Term
structures
Definition

COMPARATIVE ANATOMY/ EMBRYOLOGY

 

if organisms derivedd from an ancestor they should have similar ____

Term
homologous structures
Definition
same evolutionary origin, now differing in structure and function
Term
vestigial organs
Definition
structures present but no longer useful
Term
convergent evolution
Definition
having different ancestors but having similar adaptations
Term
embryos
Definition
while these are devolping, scientists can look at similarities
Term
endosymbiosis
Definition

process of pre-eukaryotic bacteria taking in prokaryotic bacteria

example mitochondria

Term
sedimentary
Definition
type of rock most fossils are found in
Term
pasteur
Definition
this scientist ahd an experiment taht convinced al scientists that spontaneous generation does not occur
Term
analogous structures
Definition
similar form and function but have different evolutionary origins
Term
DNA
Definition
in molecular biology, can study progressive evolution by look at ____
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