Biology
Assertion (A): Permanent tissues form the bulk of the plant body and they do not divide.
Reason (R): Permanent tissues mature into fixed, specialised cells that carry out specific functions, so they no longer retain the ability to divide.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true but R is false.
- A is false but R is true.
Tissues
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Answer
Both A and R are true and R is the correct explanation of A.
Reason — A is true as permanent tissues make up most of the plant body and generally do not divide.
Permanent tissues consist of mature, specialised cells that have lost their ability to divide because they are differentiated for specific functions.
R is true as loss of the ability to divide due to specialization directly explains why permanent tissues do not divide.
Therefore, Both A and R are true and R is the correct explanation of A is the correct option.
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Related Questions
The tissue in which the cells are filled with fat globules is :
- Epithelial tissue
- Adipose tissue
- Nervous tissue
- Areolar tissue
Assertion (A): Meristematic tissues consist of undifferentiated, actively dividing cells.
Reason (R): Meristems are undifferentiated as they divide and redivide and produce a large number of cells. They are not specialized for any particular function.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
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Assertion (A): All organisms, whether unicellular or multicellular, start their life from a single celled structure called the zygote.
Reason (R): Zygote is formed by the fusion of two unicellular structures (gametes) during the process of fertilization among higher plants and animals.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
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Assertion (A): Blood and lymph, both contain the same fluid (plasma) but they differ from each other in their cellular contents.
Reason (R): Blood contains red blood cells and platelets whereas lymph contains only white blood cells.
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