_________inflorescence is a compact spike-like inflorescence with small unisextual flowers.

Options

A. Spike
B. Corymb
C. Catkin
D. Umbel

Explanation

To solve the question regarding the type of inflorescence that is described as a compact spike-like structure with small unisexual flowers, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Inflorescence**:
- Inflorescence refers to the arrangement of flowers on a plant. It is a cluster of flowers that can be arranged on a branch or a system of branches.

2. **Identify the Characteristics of Inflorescence**:
- Inflorescences can be categorized based on the arrangement of flowers on the main axis and can be classified as determinate or indeterminate.

3. **Review the Types of Inflorescence**:
- There are various types of inflorescence, including:
- **Spike**: An elongated unbranched inflorescence with sessile flowers.
- **Raceme**: An elongated unbranched inflorescence with pedicel flowers.
- **Panicle**: A branched raceme.
- **Catkin**: A compact spike-like inflorescence with unisexual flowers.

4. **Analyze the Given Options**:
- The options provided are: spike, kariyam, catling, catkin, amber.
- From the definitions, we need to identify which one corresponds to a compact spike-like structure with unisexual flowers.

5. **Select the Correct Answer**:
- The term that fits the description of a compact spike-like inflorescence with small unisexual flowers is **catkin**. Catkins are often pendant and fall as a unit, and examples include plants like cottonwood and oak.

### Final Answer:
The correct answer is **catkin**.

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