A Latin word meaning "kind" or "appearance." - Campbell-Reece 6th Edition
Macro Evolution - Refers to the origin of a new taxonomic group
Micro Evolution - Changes over time in allele frequencies in a population
Speciation - Process by which a new species arises
There are many barriers that prevent members of different species from interbreeding. These barriers can be broken into two types:
Pre zygotic barriers - Prevent mating between species or hinder fertilization
Post zygotic barriers - Prevent fertilized egg from developing into a fertile adult
Examples
Habitat isolation: two species can live in the same geographic area, but not in the same habitat; this will prevent them from from mating
A specific case of this would be two species of garter snakes occur in the same geographic region but one lives mainly in water while the other is terrestial.
Multiple Choice
1. A species is most accurately defined as ______
a) A single population
b) Organisms with the ability to mate and produce fertile offspring
c) An organism
d) A family of organisms
2. _____ refers to origin of new taxonomic groups
a) Macro evolution
b) Origin of species
c) Evolution
d) Micro evolution
3. _____ refers to changes over time in allele frequencies in a population
a) Macro Evolution
b) Natural Selection
c) Micro Evolution
d) Speciation
Answers : 1. b; 2. a; 3. c.
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