Examkin

Question

Difficulty: MediumSpermatophytes: Gymnosperms and Angiosperms

Which of the following structural features distinguishes gymnosperms from angiosperms?

  1. The presence of exposed ovules borne on megasporophylls or cones rather than enclosed within an ovaryAnswer
  2. B
    The complete absence of vascular conducting tissues such as xylem and phloem
  3. C
    The production of seeds enclosed within a protective ovary wall that matures into a fruit
  4. D
    The translocation of manufactured organic sucrose through xylem elements rather than phloem

Answer

Gymnosperms possess exposed ovules on megasporophylls or cone scales rather than ovules enclosed within an ovary wall.
Gymnosperms are vascular seed plants characterized by having naked seeds. Their ovules lie exposed on the surface of megasporophylls or cone scales during pollination, unlike angiosperms whose ovules are protected inside an ovary that later ripens into a fruit.

Step-by-Step Solution

1
Identify the taxonomic scope and core morphological definitions of Gymnosperms and Angiosperms within Spermatophytes.
Spermatophytes are seed-bearing plants divided into Gymnosperms (naked-seeded plants) and Angiosperms (enclosed-seeded plants).
Understanding fundamental anatomical distinctions is required to compare seed-bearing plant groups.
2
Evaluate the reproductive anatomical arrangement of ovules in gymnosperms.
In gymnosperms, ovules are exposed directly on megasporophylls or cone scales and remain naked without ovary enclosure.
Angiosperms develop enclosed ovules within carpels/ovaries that mature into fruits following fertilization.

Key Concept

Structural differences in seed enclosure and reproductive morphology between Gymnosperms and Angiosperms
Estimated Time:1m 0s
Rate this question

Topics

Spermatophytes: Gymnosperms and Angiosperms

More questions from this topic