Humans are causing extinctions at a tremendous rate, 100x faster than expected without human activity, and parallels or exceeds previous mass extinction events.
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What caused the biodiversity crisis?
Habitat destruction, introduced species, over exploitation of fish, deforestation, pollution and drainage of wetlands.
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How did the finches reach the Galapagos and how did they survive?
Prevailing winds. Able to flourish as food was plentiful. Competition within populations and random mutations in species created greater advantage, and so induced natural selection.
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3 features of kingdom Prokaryote
Unicellular, peptidoglican cell wall, no internal cell membranes.
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3 features of kingdom Procotista
Eukaryotic, membrane bound organelles, many single celled organisms.
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