According to cell theory, what do these four organisms have in common? A) They are made of one or more cells. B) They must undergo sexual reproduction. C) They have a nucleus or control center. D) They require carbon dioxide to produce food.
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Option A: They are made of one or more cells.
- The cell theory speaks about the basic characteristics of cells like the origination of a cell and its importance.
- This scientific theory was composed during the mid 19th century.
- The theory comprises three aspects of a cell and they are:
- The cell in any living organism irrespective of size, shape, or other factors contains either one or more cells that are unicellular or multicellular.
- A cell is a basic unit or the foundation of structure and functions in organisms.
- From their ancestors or pre-existing cells or parent cells, a new cell is developed or a daughter cell is formed.
- Currently, in 2021 many scientists believe that viruses that belong to non-cellular entities are considered living organisms.
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According to the cell theory the four organisms have A) They are made of one or more cells in common
Cell theory
The cell theory was put forth by Schleiden and Schwann. It is one of the basic principles of biology and was formulated in the 19th century
Postulates of the cell theory
- All organisms are made of cells - may it be a single-celled bacteria, which is prokaryotic and single-celled, or Humans, which are multicellular and eukaryotic all are made up of cells. The cells form various tissues, tissues form the organ, organ forms the organ system, and so on.
- Cells are the basic structural unit of all organisms- How complex the organism might be, all the functions may it be replication or digestion all takes place due to the activity of the cells. Hence it is the structural and functional unit of an organism
- All cells come from the pre-existing ones- all the cells present in the organism are born from the division of a pre-existing parental cell. From that parental cell, the existing cell gets all its qualities.
Hence the cell theory proposed by Schleiden and Schwann suggests that all the four organisms have one or more cells in common
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