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Question

Directions: Choose the correct option:​
Assertion (A): Sieve tubes are made up of sieve plates that help in conduction. ​
Reason (R): Phloem parenchyma gives mechanical support.​

A
Assertion(A) is true and reason(R) is false.​
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B
Assertion(A) is false and reason(R) is false.​
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C
Both assertion(A) and reason(R) are true, but reason(R) is not the correct explanation for assertion.​
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D
Both assertion(A) and reason(R) are true and reason(R) is the correct explanation for assertion(A). ​
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Solution

The correct option is A Assertion(A) is true and reason(R) is false.​
Correct option: (c) Assertion(A) is true and reason(R) is false​
  • Both sieve tubes and phloem parenchyma are cells of the phloem tissue. ​
  • Sieve tubes are elongated, cylindrical, thin-walled cells with perforated ends and form a part of phloem tissue.​
  • They help in the conduction or transportation of substances.​
  • Phloem parenchyma contains living cells with thin cell walls. They mostly help in storage of starch and other organic substances. ​
  • Therefore, the assertion is true and the reason is false.​

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