Petaloid sepals serve the function of?

Step 1: Analyze the question The question asks about the function of petaloid sepals. "Petaloid" means "petal-like", so these are sepals that look like petals, usually brightly coloured, instead of being the usual small green structures.

Step 2: Explain the concept

• Normal sepals are green and form the calyx. They protect the flower bud and can carry out some photosynthesis.
• Petals are usually colourful and scented. They attract pollinators such as bees, butterflies, and birds.
• Petaloid sepals are sepals that have become colourful and petal-like. Examples are the bougainvillea (the colourful "flower" parts are actually bracts) and lilies and tulips (where the sepals and petals look alike, called tepals). Because they look like petals, they do the same job as petals.

Step 3: Evaluate the options

• A. Carrying out photosynthesis: This is the job of green, leaf-like sepals, not coloured petaloid ones.
• B. Attracting pollinating agents to a flower: Correct. Their bright colour draws insects and other pollinators, just as petals do.
• C. Retaining pollen grains in the corolla tubes: This is not a function of sepals.
• D. Protecting the inner floral parts: This is the function of ordinary green sepals, especially in the bud stage. Petaloid sepals are distinguished by their showy, attractive role.

Step 4: Answer The correct answer is B. attracting pollinating agents to a flower.

Step 5: Exam tip When you see "-oid" in a term, think "looks like". Petaloid means "looks like a petal", so it does what petals do: attract pollinators. Remember: sepals protect, petals attract, and petaloid sepals attract.