A. Stigmas are usually large and feathery
B. Nectary is usually absent
C. The pollen grains have rough spiny surfaces
D. The flowers are not scented.

Correct Answer:

Option C – The pollen grains have rough spiny surfaces

Explanation

Wind-pollinated flowers:

  • No bright colors, special odors, or nectar.
  • Small.
  • Most have no petals.
  • Stamens and stigmas exposed to air currents.
  • Large amount of pollen.
  • Pollen smooth, light, easily airborne.
  • Stigma feathery to catch pollen from wind.

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