Question

Are sieve tubes present in gymnosperms?

Answer 1

Answer:

No

Explanation:

Sieve tube cells are absent in pteridophytes and gymnosperms.

These plants have sieve cells in place of sieve tubes, which are not arranged distinctly in linear rows.

Like sieve tube, the sieve cells also have plates but, on their lateral or side walls.

Moreover, sieve cells are not much specialised like sieve tubes of angiosperms.

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Answer 2

Answer:

YES

Explanation:

AS THE FIRST OBSERVATION OF VASCULAR TISSUE IN PTERIDOPHYTA HAPPENS THERE CONTINUES THE VASCULAR TISSUE UPTO ANGIOSPERMS