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Ch 12 Bio

QuestionAnswer
Primordial soup model nonliving matter reacted chemically to form simple organic molecules
Lerman developed bubble model of origin of life’s chemicals
Origin of cells not clearly understood
RNA formed before DNA, helped form first proteins
Eukaryotes membrane bound organelles and a nucleus
Prokaryote no membrane bound organelles or nucleus
Mitochondria/chloroplast own DNA
Protista Algae, plankton
Mass extinction ended era’s , no set length of time in between
Flight helped insects search for food, mates, nests
Insects first animals on land, first to evolve wings
Arthropods have a hard outer skeleton and jointed appendages
Reptiles dry environments, water tight skin
Earth 4.5 billion years, 5 mass extinctions
Microspheres first step to cellular organization
Cyanobacteria ancestors to chloroplast, produced oxygen
Bacteria classified by cell walls, proteins, and cell membranes
Pre eukartyotic cells no DNA
Endosymbiosis small prokaryotes move into a larger cell and formed eukaryotes, mitochondria, chloroplast
Multicellular oldest fossils are 700 million years old, more than one cell, recent development, some protists
Ozone layer blocks UV radiation
First living things on land plants and fungi, had to overcome drying out
Amphibians lungs, four sturdy limbs, oxygen rich blood
Created by: evroman
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