Which among the following is incorrect about tissue level of organizat...
Cells performing same functions group together to form a tissue. Organs are absent in this level of organization. Cells are specialized with division of labour. Example for this level of organization is Hydra. Planaria exhibits organ level of organization.
Which among the following is incorrect about tissue level of organizat...
The incorrect option about the tissue level of organization is option 'C', which states that Planaria exhibits this level of organization.
Explanation:
The tissue level of organization is the second level of biological organization, following the cellular level. It involves the grouping together of cells that perform similar functions to form tissues. Tissues are groups of cells that work together to carry out specific functions in the body. This level of organization is found in multicellular organisms, where cells of similar types come together to perform specialized functions.
Let's analyze each option to understand why option 'C' is incorrect:
a) Cells performing same functions group together to form a tissue:
This statement is correct. Cells with similar functions aggregate to form tissues. For example, muscle cells join together to form muscle tissue, and nerve cells come together to form nervous tissue.
b) Organs are absent:
This statement is incorrect. Organs are formed when different tissues work together to perform a specific function. Examples of organs include the heart, lungs, liver, and brain.
c) Planaria exhibits this level of organization:
This statement is incorrect. Planaria is a type of flatworm that exhibits organ-level organization. It has specialized tissues such as muscle tissue, nerve tissue, and reproductive tissue, which work together to carry out different functions.
d) Cells are specialized with division of labour:
This statement is correct. In tissues, cells become specialized to perform specific functions. This division of labor allows for efficient functioning of the organism. Examples include red blood cells specialized for oxygen transport, and epithelial cells specialized for lining body surfaces.
In conclusion, option 'C' is incorrect because Planaria exhibits organ-level organization, not tissue-level organization.
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