Evidence from vascular tissues and developmental stages suggests that stamens evolved from:
A) stems.
B) pollen grains.
C) roots.
D) leaves.
E) megasporangia.

Question

Quizplus · Accepted Answer

Stamens are believed to have evolved from leaves, specifically from modified leaves called microsporophylls, which bear the microsporangia (pollen sacs). This is supported by evidence from vascular tissues and developmental stages.

Evidence from Vascular Tissues and Developmental Stages Suggests That Stamens