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7 Sci Ch 12
7th Grade Science Chapter 12 Vocabulary
Question | Answer |
---|---|
COMPOUND LIGHT MICROSCOPE | MAGNIFIES AND OBJECT BY ALLOWING LIGHT TO PASS THROUGH IT AND THEN THROUGH TWO OR MORE LENSES. |
ELECTRON MICROSCOPE | USES A MAGNETIC FIELD TO BEND BEAMS OF ELECTRONS. |
CELL THEORY | ALL ORGANISMS ARE MADE UP OF ONE OR MORE CELLS. CELLS ARE THE BASIC UNITS OF STRUCTURE AND FUNCTION IN ALL ORGANISMS. ALL CELLS COME FROM CELLS THAT ALREADY EXIST. |
CELL | SMALLEST UNIT THAT CARRIES OUT THE ACTIVITIES OF LIFE IN ORGANISMS. |
PROKARYOTIC CELL | HAS NO MEMBRANE AROUND ITS GENETIC MATERIAL. |
EUKARYOTIC CELL | HAS A NUCLEUS CONTAINING GENETIC MATERIAL SURROUNDED BY A MEMBRANE. |
CELL MEMBRANE | STRUCTURE THAT FORMS THE OUTER BOUNDARY OF A CELL AND ALLOWS ONLY CERTAIN MATERIALS TO MOVE INTO AND OUT OF THE CELL. |
NUCLEUS | DIRECTS ALL THE ACTIVITIES OF THE CELL. |
CHROMATIN | FORM OF HEREDITARY MATERIAL MADE OF PROTEINS AND DNA. |
CYTOPLASM | GELATIN-LIKE MIXTURE INSIDE THE CELL MEMBRANE. |
ORGANELLES | STRUCTURES WITHIN THE CYTOPLASM OF EUKARYOTIC CELLS. |
ENDOPLASMIC RETICULUM | FOLDED MEMBRANE THAT MOVES MATERIALS AROUND IN A CELL. |
RIBOSOMES | TWO-PART STRUCTURES THAT MAKE PROTEINS. |
GOLGI BODY | PACKAGE PROTEINS TO BE MOVED OUTSIDE OF THE CELL. |
MITOCHONDRIA | WHERE FOOD MOLECULES ARE BROKEN DOWN AND ENERGY IS RELEASED. |
LYSOSOMES | CONTAIN DIGESTIVE CHEMICALS THAT BREAK DOWN FOOD MOLECULES, CELL WASTES, AND WORN OUT CELL PARTS. |
CELL WALL | RIGID STRUCTURE THAT SUPPORTS AND PROTECTS A PLANT CELL. |
CHLOROPLASTS | GREEN ORGANELLES IN THE CYTOPLASM WHERE PHOTOSYNTHESIS TAKES PLACE. |
ORGAN | STRUCTURE MADE UP OF DIFFERENT TYPES OF TISSUES THAT WORK TOGETHER TO DO A PARTICULAR JOB. |
VIRUS | NONLIVING PARTICLE CONSISTING OF A CORE OF HEREDITARY MATERIAL SURROUNDED BY A PROTEIN COAT. |
HOST CELL | THE LIVING CELL IN WHICH A VIRUS MUST REPRODUCE. |