Campbell Biology 9th - Unit 1
Subject:
Biology [1]
Tags:
Biology [2]
organelles [3]
Membrane biology [4]
Cell Biology [5]
Cell membrane [6]
cell [8]
Cytosol [9]
Vesicle [10]
mitochondrion [11]
Membrane protein [13]
health [14]
Ch.7 ? Membrane What makes something alive? What do all living things have in common? Carbon based Cells DNA Living organisms 1.8 million known species 10-100 million estimates species 3 domains Bacteria Archea Eukarya Same basic components Cells ? lowest level of organization that can perform all activities required for life Eukaryotic ? nucleus & other membrane-bound structures Prokaryotic ? simpler, membrane & DNA Cells & tissues made from same set of chemicals Carbon Nitrogen Hydrogen Oxygen Organic molecules/nutrients cycle through organisms & environment All organisms transfer & transform energy to power cellular processes Living organisms have been around for billions of years Prokaryotes ? 3.5 billion years ago Eukaryotes ? 2 billion Multi-cellular life ? 1.2 billion