Andrew notices that irrespective of the way he positions a seed for germination, the root always grows toward the ground, while the shoot always grows away from the ground. The described behavior of roots is termed as

Options

A. gravitropism
B. phototropism
C. hydrotropism
D. thigmotropism

Answer

To answer the question regarding the behavior of roots and shoots during germination, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Observation of Plant Behavior**: Andrew noticed that regardless of how he positioned the seed, the root consistently grows downward toward the ground, while the shoot grows upward away from the ground.

2. **Understanding Tropism**: The behavior of plants in response to environmental stimuli is known as tropism. There are different types of tropisms based on the stimulus involved.

3. **Identifying the Stimulus**: In this case, the stimulus affecting the roots is gravity. The roots grow in the direction of the gravitational pull, which is downward.

4. **Classifying Root Behavior**: Since the roots are growing toward the gravitational force, this behavior is termed **positive geotropism** (or positive gravitropism).

5. **Classifying Shoot Behavior**: Conversely, the shoots grow away from the gravitational pull, which is termed **negative geotropism** (or negative gravitropism).

6. **Conclusion**: Therefore, the behavior of the roots, which grow toward the ground, is specifically referred to as **positive geotropism**.

### Final Answer:
The described behavior of roots is termed as **positive geotropism**.

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