Question

The wing of the seed of pinus develops from

• A. Outer layer of the integument and basal part of the ovuliferous scale
• B. Inner layer of the integument and basal part of the ovuliferous scale
• C. Only from outer layer of the integument
• D. From ovuliferous scale

Answer 1

The correct option is C Only from outer layer of the integument

Each microsporophyll bears two microsporangia. The immature sporophyte is an embryo. While this is happening the outermost layer of the ovule, the integument, develops into the seed coat. Mature embryo is differentiated into root, stem and leaves or pollen sacs on lower surface.

Therefore, the correct answer is option C.