The swollen part at the base of a flower from which the whorls of the flower radiatc is called the

Options

A. thalamus
B. pedicel
C. pistil
D. carpel

Explanation

**Step-by-Step Solution:**

1. **Identify the Structure of the Flower**: The question asks about a specific part of the flower that is swollen and from which the other parts of the flower radiate.

2. **Recognize the Parts of the Flower**: The flower consists of several parts, including petals, sepals, stamens (male reproductive parts), and carpels (female reproductive parts).

3. **Locate the Base of the Flower**: At the base of the flower, there is a structure that supports the flower and from which the various whorls (layers) of the flower emerge.

4. **Identify the Correct Term**: The swollen part at the base of the flower is known as the "thalamus" or "receptacle." This is the part from which the flower's whorls (petals, sepals, stamens, and carpels) radiate.

5. **Conclude the Answer**: Therefore, the swollen part at the base of a flower from which the whorls of the flower radiate is called the "thalamus" or "receptacle."

**Final Answer**: The swollen part at the base of a flower from which the whorls of the flower radiate is called the **thalamus** (or **receptacle**).

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