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All Words

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
cell   The smallest unit that can perform all life processes and contains all of the materials necessary for life.  
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stimulus   Anything in the environment that causes a response or change in an organism.  
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homeostasis   The process of an organism maintaining a constant and stable internal state in a changing environment.  
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metabolism   The total of all chemical activities that an organism performs.  
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proteins   One of the five chemical building blocks of cells that are used to build cells and cellular structures.  
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amino acids   The molecules that make up proteins.  
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carbohydrates   One of the five chemical building blocks of cells that are used as a source of energy and for energy storage.  
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simple carbohydrate   A carbohydrate made of one sugar molecule or a few linked sugar molecules.  
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complex carbohydrate   A carbohydrate made of hundreds of sugar molecules linked together.  
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lipids   One of the five chemical building blocks of cells that store energy and make up the cell membrane.  
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phospholipids   A special type of lipid that forms much of the cell membrane.  
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ATP   One of the five chemical building blocks of cells that the major energy-carrying molecules in the cell.  
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nucleic acids   One of the five chemical building blocks of cells that carry the genetic information of an organism.  
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nucleotides   The molecules that make up nucleic acids.  
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photosynthesis   The process by which plants make their own food (sugar) from carbon dioxide, water, and energy from sunlight.  
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chlorophyll   The green pigment in plants that absorbs light energy.  
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glucose   The sugar produced during photosynthesis.  
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cellular respiration   The process by which cells use oxygen to release energy from food.  
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cuticle   A waxy coating that protects the plant from water loss.  
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stoma   The opening in a leaf’s epidermis (outer layer) through which carbon dioxide and oxygen are exchanged.  
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guard cells   The “double doors” that open and close a stoma for gas exchange.  
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transpiration   The loss of water from the leaves of plants.  
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tropism   Plant growth in response to a stimulus.  
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phototropism   The process that occurs when plants grow towards light.  
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gravitropism   The process that occurs when plants grow shoots away from gravity (upwards).  
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