Which of the following is made up of dead cells? - Biology MCQ NEET 2017 2026 | ExamTest.live | ExamTest.live

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Which of the following is made up of dead cells?

A $Xylem parenchyma$
B $Collenchyma$
C $Phellem$
D $Phloem$

Solution & Step-by-step Explanation

Phellem (cork) is formed by the cork cambium during secondary growth. Its cells are heavily suberized and are dead at maturity. Xylem parenchyma and phloem (sieve tubes, companion cells) contain living protoplasm. Collenchyma is a living mechanical tissue.

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Which of the following is made up of dead cells?

A

Xylem parenchyma

B

Collenchyma

C

Phellem

D

Phloem

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