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Cards In This Set
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Why are plant and animal specimens usually stained with dyes before observing them through a microscope ?name one stain used for this purpose
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It is done to identify the different components of a cell easily through the microscope. eg iodine solution
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What is a tissue?give two examples of tissues
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The group of similar cells which work together to perform a particular function is called tissue eg.muscle tissue , photosynthetic tissue
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What is an organ ?give two examples of organs
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An organ is a collection of different tissues which work together to perform a particular function in the body of an organism eg.heart , stomach
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What is an organ system
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A group of interconnected organs which works together to do a big job for the organissm,is called an organ system
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Give two examples of organ systems in animals
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Muscular system and digestive system
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Name the two main organ system in plants
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Root system and shoot system
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Which of the following are plant organs and which are the animal organs
brain , leaf , lungs , roots , stem , kidneys , flower , heart |
Plant organ-leaf,roots,stem,flower
animal organ-brain,lungs,kidneys,heart |
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What are the function of the following organs
a). heart b) brain c) roots) d) leaves |
Heart-it pumps blood around the body
brain-it controls all parts of the body roots-it absorbs water and dissolved mineral salts from the soil leaves-it prepare food for the plant by the process of photosynthesis |
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What is the shape of a red blood cells in human blood?what function do red blood cells perform
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It is spherical in shape and carries oxygen around the body
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State the difference between eukaryotes and prokaryotes
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Eukaryotes-the cells having nuclear material enclosed by a nuclear membrane is called eukaryotes
prokaryotes-the cells having nuclear material without a nuclear membrane around it are called prokaryotes |
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Name two prokaryotes and two eukaryotes
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Prokaryotes-bacteria,blue green algae
eukaryotes-the cells having nuclear material enclosed by a nuclear membrane are called eukaryotes |
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Why are nerve cells long and have branches
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It is because they can come in contact with many other nerve cells and carry messages over long distances between brain and other parts of the body
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What is the other name of a nerve cell
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It is called neuron.
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Why could cells not be observed and studied for thousand years
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It is because the cells are too small to be seen with naked eye and there was no microscope with high magnification with which they study the cells in detail
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State the cell theory of organisms
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The cell theory states that the basic unit of structure and function of all living organisms is the cell
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