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  • Assertion (A) : While centriole is missing from all higher plant cells, the centriole is present in certain lower plant cells.  Reason (R) : Since they have spind

Assertion (A) : While centriole is missing from all higher plant cells, the centriole is present in certain lower plant cells. 

Reason (R) : Since they have spindle fibre outside of the nuclear membrane.

 

Option: 1

Both A and R are true and R is the correct explanation of A.


Option: 2

Both A and R are true but R is not the correct explanation of A.


Option: 3

A is true but R is false.

 


Option: 4

A is false but R is true.


Answers (1)

best_answer

While it is missing from all higher plant cells, the centriole is present in certain lower plant cells. Plant cells do not require centrioles during cell division since they have spindle fiber outside of the nuclear membrane. The protein filaments that make up the spindle are biological structures. When cell division begins, these microtubule-containing filaments join the chromosomes directly to arrange them in the cell center. The filaments then contract, separating the chromosomes. Hence, option 1 is the correct answer which states that both Assertion and Reason are true and Reason is the correct explanation of Assertion.

 

Posted by

Ritika Jonwal

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