Most plants continue to obtain new sources of mineral nutrients by

Options

A. Breaking down organic matter
B. Growing longer roots
C. Evolving more PS
D. Microbes

Answer

**Step-by-Step Text Solution:**

1. **Understanding the Question**: The question asks how most plants continue to obtain new sources of mineral nutrients throughout their life.

2. **Analyzing the Options**:
- **Option 1: Breaking down organic matter** - This option suggests that plants obtain nutrients by decomposing organic matter. This is incorrect because plants primarily absorb nutrients from the soil rather than breaking down organic matter themselves.

- **Option 2: Growing longer roots** - This option indicates that plants can extend their root systems to access new sources of mineral nutrients in the soil. This is correct, as roots can grow and explore new areas of soil, allowing the plant to absorb more nutrients over time.

- **Option 3: Evolving more photosystems** - This option implies that plants can evolve their photosynthetic systems to obtain nutrients. This is incorrect, as photosystems are primarily involved in photosynthesis and do not directly contribute to mineral nutrient absorption.

- **Option 4: Microbes** - While microbes in the soil can assist in nutrient availability, the primary means by which plants absorb mineral nutrients is through their roots. Therefore, this option is not the best answer.

3. **Conclusion**: The most accurate answer to the question is **Option 2: Growing longer roots**. This allows plants to continuously access new sources of mineral nutrients throughout their life.