Which is absent in Asteraceae?

Options

A. Cypsela fruit
B. Capitulum inflorescence
C. Hypogynous flowers
D. Syngenesious anthers

Answer

To determine what is absent in the Asteraceae family, we can follow these steps:

### Step 1: Understand the Asteraceae Family
The Asteraceae family, also known as the Compositae family, includes a wide variety of flowering plants such as sunflowers, daisies, and cosmos. It is the largest family of flowering plants, with around 32,000 species and 1,900 genera.

**Hint:** Remember that Asteraceae is known for its diverse species and unique floral structures.

### Step 2: Analyze the Options
The question provides several options regarding what might be absent in the Asteraceae family. We need to evaluate each option:

1. **Sepsela Fruit**: This is a type of dry, single-seeded fruit that develops from a double ovary. It is present in the Asteraceae family.

**Hint:** Look for characteristics of fruits in the Asteraceae family.

2. **Capitulum Inflorescence**: This is a characteristic inflorescence of the Asteraceae family, where flowers are clustered together in a head-like structure. This is also present in Asteraceae.

**Hint:** Consider the structure of flower arrangements in this family.

3. **Hypogynous Flowers**: Hypogynous flowers have a superior ovary, meaning the ovary is above the other floral parts. In Asteraceae, the flowers are typically epigynous, meaning the ovary is below the other floral parts.

**Hint:** Focus on the position of the ovary relative to other flower parts.

4. **Syngeneceous Anthers**: These are anthers that are united while the filaments are free. This characteristic is present in the Asteraceae family.

**Hint:** Think about the structure of anthers in relation to the filaments.

### Step 3: Identify the Correct Answer
From the analysis:
- The **Sepsela fruit**, **Capitulum inflorescence**, and **Syngeneceous anthers** are all present in the Asteraceae family.
- The **Hypogynous flowers** are absent in this family, as Asteraceae flowers are epigynous.

**Final Answer:** Hypogynous flowers are absent in Asteraceae.

### Summary of Steps:
1. Understand the Asteraceae family and its characteristics.
2. Analyze each option provided in the question.
3. Identify which option is not present in the Asteraceae family.