INTRODUCTION
CELL ORGANELLES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They must reproduce sexually.
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They are composed of one or more cells.
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They are capable of making their own food.
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They have organ systems to carry out the processes of life.
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Detailed explanation-1: -The unified cell hypothesis states that all living things are composed of one or more cells. The cell is the fundamental unit of life and new cells arise from existing cells.
Detailed explanation-2: -All living organisms are composed of structural and functional units called cells. The body of a living organism may be composed of a single cell or many cells. A cellis the smallest unit of life that can replicate independently.
Detailed explanation-3: -All living things are made of cells; the cell itself is the smallest fundamental unit of structure and function in living organisms. (This requirement is why viruses are not considered living: they are not made of cells.
Detailed explanation-4: -Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. Unicellular organisms include bacteria, protists, and yeast.