NEET BIOLOGY

Detailed explanation-1: -The sieve plates are present in sieve tube members of the angiosperms but it is absent in the sieve cells of gymnosperms.So the major difference between the phloem of angiosperms and gymnosperms is sieve tube.

Detailed explanation-2: -Unlike angiosperms, gymnosperms do not have companion cells. They only have sieve cells for food conduction and albuminous cells that fulfill companion cell’s functions.

Detailed explanation-3: -Companion cells are the cells found in angiosperms with abundant plasma and nucleus. Complete answer: In Gymnosperms, the phloem lacks both the sieve tube and the corresponding cells. Instead they contain sieve cells for food material conduction.

Detailed explanation-4: -Angiosperms like all vascular plants have a sporophyte-dominant life cycle. Gymnosperms also have a sporophyte-dominant life cycle as in other vascular plants. So, the correct answer is ‘Both have stems, leaves, and roots’.

Detailed explanation-5: -As vascular plants, both groups contain xylem and phloem. All but the most ancient angiosperms contain conducting tissues known as vessels, while gymnosperms (with the exception of Gnetum) do not.