ch.7

describes the variety of life across all levels of ecological organization

• biodiversity

• distrubution

• classification

• species

differences in DNA among individuals

• Genetic diversity

• species diversity

• ecosystem diversity

variety of species in a given area

• species divesity

• genetic diversity

• ecosystem diversity

variety of habitats, ecosystems, communites

• ecosystem diversity

• species diversity

• genetic diversity

taxonomists classify species based on

• physical apperance

• genetic makeup

species are placed into a hierarchy of taxonomic groups:

• Genus

• Family

• Order

• Phylum

• Kingdom

  Domain

________ _________ reflects evolutionary relationships among species

• taxonomic groups

• biodiversity distribution

• ecosystem services

• biodiversity loss

below the ________ level, organisms may fall into subspecies—populations with genetically based characteristics that differ area to area

• species

• distribution

• ecosystem

• classification

there are likely between _ and _ million species on Earth

• 5 30

• 10 100

• 10 20

• 50 500

can be difficult to find and identify

• species

• economic

• wildlife

• changes