Examkin

Question

Difficulty: MediumReproductive Systems and Processes in Organisms

A botanical survey identifies a flowering plant species characterized by brightly colored petals, sweet fragrance, and sugary nectar-secreting glands. Which of the following structural modifications would also be present in this flower to complement its mode of pollination?

  1. Sticky, compact stigmas located inside the flower crownAnswer
  2. B
    Feathery stigmas hanging freely outside the floral envelope
  3. C
    Smooth, lightweight pollen grains produced in vast numbers
  4. D
    Pendulous stamens with versatile anthers exposed to air currents

Answer

Sticky, compact stigmas located inside the flower crown
Bright petals, fragrance, and nectar are distinct adaptations for insect pollination. Flowers relying on insects feature sticky, compact stigmas located within the floral crown so that pollen from visiting insects readily adheres to the female reproductive organ.

Step-by-Step Solution

1
Identify the primary mode of pollination from the given floral traits.
Brightly colored petals, fragrance, and nectar glands indicate insect pollination (entomophily).
Visual attractions, scent, and food rewards are specialized mechanisms to attract animal vectors like insects.
2
Deduce corresponding structural adaptations required for entomophily.
The flower requires sticky or lobed stigmas positioned inside where visiting insects brush past them.
A sticky surface ensures pollen grains transferred from an insect's body adhere effectively.
3
Distinguish entomophilous adaptations from anemophilous features.
Features such as feathery stigmas, smooth light pollen, and versatile anthers are specialized for wind pollination.
Wind-pollinated flowers rely on air currents rather than animal vectors, requiring high exposure and aerodynamic pollen.

Key Concept

Floral Adaptations for Insect Pollination (Entomophily)
Estimated Time:1m 0s
Rate this question

Topics

Reproductive Systems and Processes in Organisms

More questions from this topic