1)  Which statement is true for all living things? a) They can move from place to place b) They are made of cells c) They make their own food d) They have a nervous system 2)  An organism is best defined as: a) Any plant b) Any animal c) Any living thing d) Any multicellular thing 3)  Which structure is the basic unit of life? a) Tissue b) Organ c) Cell d) System 4)  A unicellular organism is one that: a) Has many cells with special jobs b) Is very small but not alive c) Lives only in water d) Has only one cell that carries out all life functions 5)  Humans are classified as multicellular because they: a) Are large b) Need food and water c) Can reproduce sexually d) Have many specialized cells 6)  Which chemical is the most common in living cells? a) Water b) Protein c) Carbohydrate d) Lipid 7)  Which chemicals mainly provide energy for cells? a) Proteins b) Lipids only c) Nucleic acids d) Carbohydrates 8)  Which substance carries genetic instructions in cells? a) DNA b) Protein c) Lipid d) Carbohydrates 9)  Growth means: a) Responding to the environment b) Becoming larger c) Making offspring d) Getting energy 10)  Development refers to: a) Change that leads to maturity b) Increase in size only c) Cell division only d) Movement 11) A stimulus is: a) An action taken by an organism b) A change or signal in the environment c) A type of cell d) A chemical in food 12) An organism’s reaction to a stimulus is called a: a) Growth b) Development c) Response d) Reflex cell

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