A plant species shows several morphological variations in response to latitudinal gradient. When grown under similar conditions of growth, the morphological variations disappear and all the variants have common morphology. What are these variants called?

Explanation

To solve the question, we will break it down step by step:

### Step 1: Understand the Context
The question describes a plant species that exhibits morphological variations in response to a latitudinal gradient. This means that the plants show different physical characteristics based on their geographical location.

**Hint:** Look for the relationship between environmental factors and morphological traits.

### Step 2: Identify the Cause of Variations
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