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NTA Abhyas NEET2020BotanyAnatomy of Flowering PlantsPractice

Which of the following statements is INCORRECT?

Options

  1. AIn the dicot root, the vascular cambium is completely secondary in origin.
  2. BWood is the common name used for secondary xylem.
  3. CA mature sieve tube element lacks peripheral cytoplasm, a large vacuole and a prominent nucleus.
  4. DLenticels are the aerating pores present in the bark of plants and are associated with gaseous exchange.

Correct answer

C. A mature sieve tube element lacks peripheral cytoplasm, a large vacuole and a prominent nucleus.

Step-by-step solution

A mature sieve element possesses a peripheral cytoplasm and a large vacuole but lacks a nucleus. The functions of sieve tubes are controlled by the nucleus of companion cells.

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