cells-the units of life. smallest organisms on earth made up of only one cell sentence: bacteria...
TRANSCRIPT
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CHAPTER 2 VOCAB
Cells-The Units of Life
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1. BACTERIA
Smallest organisms on Earth
Made up of only one cell
Sentence: Bacteria are 1 celled organisms.
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SALMONELLA BACTERIA
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2. CELL MEMBRANE Flexible structure that holds a cell together
Boundary between cell & its environment
Helps control what enters & exits the cell
“gate keeper” of cell
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Sentence: A cell’s membrane is its “gatekeeper”
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3.CELL WALL Found in structure of plants, algae, fungi, & many bacteria types
Supports & protects cell membrane
Sentence: Plants have a rigid cell wall.
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4. CYTOPLASM Gelatin like substance inside cell membrane
Contains water, chemicals, and cell parts (organelles)
Where cell’s activities take place
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5. ORGANELLE Specialized cell parts that move around in a cell
Perform jobs necessary for cell to live
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6. NUCLEUS Cell organelle that contains hereditary material (DNA in chromosomes)
Directs most of cell’s activities
“cell boss”
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7. VACUOLE Balloon like cell organelle Can store food, water, & other
substances “cell closet”
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8. MITOCHONDRIA Provides usable energy for the cell Where process of cellular respiration
takes place “cell powerhouse”
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9. PHOTOSYNTHESIS Process plants, algae, and many
bacteria use to make food
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10. CHLOROPLAST Green organelle in a plant’s leaf Where photosynthesis occurs “cell kitchen”
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11. TISSUE Groups of similar cells that all do
the same work
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12. ORGAN Structure made of 2 or more
types of different tissue Work together to do a certain job
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13. ORGAN SYSTEM Group of organs that work
together to perform a certain job