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2 hinged shells, ex. clams, oysters, scallops
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1 Derived Trait 2 Bivalves
3 Clade 4 Alfred Wallace
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Terms in this set (150)
Derived Trait features of modern organisms that do NOT appear in common
ancestor
Ancestral Trait features of modern organisms that do appear in common
ancestor
Evolutionary Reversal a character reverts from a derived state to an ancestral trait
Origin of Species written about Charles Darwin's work with finches and how
they shared a common ancestor and common trait
Alfred Wallace naturalist who came to a similar conclusion as Darwin that
natural selection could explain the origin of species,
biological diversity, and similarities among related life forms.
Darwin's Pigeon's showed selective breeding
, Population a group of individuals that belong to the same species and
live in the same area
Morphology Branch of biology dealing with the form and structure of
animals and plants
Behavior can be inherited or culturally transmitted;
The way an organism reacts to changes in its internal
condition or external environment.
Phylogeny Evolutionary history of a species or group of species.
Systematics study of the diversity of life and the evolutionary relationships
between organisms
Node the point in a phylogenetic tree. where lineage's diverge
Clade a group of species that shares a common ancestor
Homologus Trait a trait shared from an ancestor in 2 or more species
Species kinds
Binomial Nomenclature Classification system in which each species is assigned a two
part scientific name
Carlous Linnaeaus invented binomial nomenclature
Biological Species Concept a species concept defining a species as a population or group
thereof whose members potentially interbreed and produce
fertile offspring
Habitat Isolation Pre-zygotic: Organisms can't get to each other to breed
Gametic Isolation Pre-zygotic: Egg and Sperm don't work together
Behavioral Isolation Pre-zygotic: Don't recognize each others behavioral mating
signs
Mechanical Isolation Pre-zygotic: Reproductive organs don't match
Temporal Isolation Pre-zygotic: Different mating seasons
Low-Hybrid Zygote Viability Post-zygotic: Fails to mature or has abnormalities
Low-Hybrid Adult Viability Post-zygotic: Low Survival Rate
Hybrid Infertility Post-zygotic: Infertile
Morphological Species Concept identifying species only by appearance
Taxon naming and classifying organisms
Pre-Zygotic barriers that prevent sperm from getting to the egg
Post-Zygotic After the egg is fertilized