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

Answer 1

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.​