Question

Cyathium and hypanthodium inflorescence are related in having

• A. Nectar glands
• B. Unisexual flower
• C. Both (1) and (2)
• D. None of these

Answer 1

The correct option is B

Unisexual flower

The correct option is B.

Explanation for correct option:

1. In cyathium inflorescence, a club-shaped structure is formed by modified leaves, and a female flower and several male flowers are there.
2. In hypanthodium inflorescence, the floral axis remains fleshy and closed.
3. Cyathium inflorescence possesses distinct extrafloral nectar glands but hypanthodium inflorescence does not always possess a nectar gland.
4. They both possess unisexual flowers which are common between the two.

Explanation for incorrect options:

Option A:

1. Nectar refers to a sugar-rich viscous secretion in the plant blossoms, leaves, and stems.
2. Cyathium inflorescence provides a nectar secreting gland.
3. But hypanthodium inflorescence does not always have nectar glands.

Option C:

1. Both hypanthodium and cyathium inflorescence possess unisexual flowers.
2. But only cyathium provides a nectar secreting gland whereas hypanthodium does not always possess it.

Option D:

1. Among cyathium and hypanthodium, cyathium flowers possess nectar glands.
2. They both possess unisexual flowers.

Final answer: Cyathium and hypanthodium inflorescence are related to having a unisexual flowers.