Which of the following statements about minerals absorption in plants is correct?

Options

A. in the initial phase rapid uptake of ions into the outer space of cells- the apoplast, is a passive process.
B. in the final phase, ions are taken in slowly into the inner space-the symplast of cells, and is an active process.
C. passive movement of ions into the apoplast occurs through ion-channels, transmembrane proteins which act as selective pores.
D. all of these

Answer

To determine which statement about mineral absorption in plants is correct, let's analyze the provided statements step by step.

### Step-by-Step Solution:

1. **Understanding Mineral Absorption Phases**:
- Mineral absorption in plants occurs in two main phases: the initial phase and the final phase.
- In the initial phase, ions are absorbed rapidly into the outer space of the cells, which is referred to as the **apoplast pathway**. This process is **passive**.
- In the final phase, ions are taken slowly into the inner space of the cells, known as the **symplast pathway**. This process is **active**.

2. **Analyzing the Statements**:
- **Statement 1**: "In the initial phase, rapid uptake of ions into the outer space of cells. Apoplast is a passive process."
- This statement is **correct** as it accurately describes the initial phase of mineral absorption.

- **Statement 2**: "In the final phase, ions are taken slowly into the inner space. The symplast of the cells is an active process."
- This statement is also **correct**. The final phase involves active transport of ions into the inner space, which is indeed a slower process compared to the initial phase.

- **Statement 3**: "Passive movement of ions into the apoplast occurs through ion channels and transmembrane proteins which act as selective pores."
- This statement is **correct** as well. The apoplast pathway allows passive movement of ions through specific channels and proteins.

3. **Conclusion**:
- Since all three statements are correct, the answer to the question is that all statements about mineral absorption in plants are accurate.

### Final Answer:
All of the statements regarding mineral absorption in plants are correct.

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