2. of Organization lower levels of organization are progressively integrated to make up Life’s Hierarchy – higher levels Watch the Amoeba Sisters : a. Atoms building blocks of matter, base of – life’s structure b. Molecules atoms come together – c. Cells living characteristics – smallest ‘living’ unit; have all d. Tissues collection of cells – e. Organs and organ systems collection of tissues – f. Organism assemblage of cells, tissues and organs – g. Population members of a single type of organism living together – h. Community all kinds of living things in a given area – i. Ecosystem a community together in its nonliving environment – Chemistry and Life (Ch. 2) I. Chemistry and Life all life has a chemical basis – A. Element 1. 92 naturally occurring elements on Earth 2. 4 of these 92 elements constitute 96.3 % of your body weight. What are they? B. Atoms 1. Structure of Atoms: subatomic particles Nucleus Atomic number Atomic mass Electrons
2. Life’s Hierarchy of Organization – lower levels of organization are progressively integrated to make up higher levels Watch the Amoeba Sisters : a. Atoms – building blocks of matter, base of life’s structure b. Molecules – atoms come together c. Cells – smallest ‘living’ unit; have all living characteristics d. Tissues – collection of cells e. Organs and organ systems – collection of tissues f. Organism – assemblage of cells, tissues and organs g. Population – members of a single type of organism living together h. Community – all kinds of living things in a given area i. Ecosystem – a community together in its nonliving environment Chemistry and Life (Ch. 2) I. Chemistry and Life – all life has a chemical basis A. Element 1. 92 naturally occurring elements on Earth 2. 4 of these 92 elements constitute 96.3 % of your body weight. What are they? B. Atoms 1. Structure of Atoms: subatomic particles Nucleus Atomic number Atomic mass Electrons
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