Water potential is the sum of two opposing forces in a plant and ………………………

Explanation

**Step-by-Step Solution:**

1. **Understanding Water Potential**: Water potential is a measure of the potential energy of water in a system compared to pure water, and it determines the direction of water movement.

2. **Components of Water Potential**: Water potential (Ψ) is the sum of two main components:
- **Solute Potential (Ψs)**: This is the effect of solute concentration on the overall water potential. When solutes are added to water, they attract water molecules, which reduces the ability of water to move freely, thus lowering the water potential.
- **Pressure Potential (Ψp)**: This refers to the physical pressure exerted on the water in a plant cell. It represents the hydrostatic pressure that can either push water into the cell or prevent water from entering the cell, thus affecting the water potential.

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