What is the main water source for land plants?

• A. Rainwater
• B. Dew
• C. Atmospheric moisture
• D. Groundwater

Answer: (D)

Verified step by step guidance

1. Understand the role of water in plant biology: Water is essential for photosynthesis, nutrient transport, and maintaining cell structure in plants.
2. Identify the primary water sources available to land plants: These include rainwater, dew, atmospheric moisture, and groundwater.
3. Consider the accessibility and reliability of each water source: Rainwater and dew are dependent on weather conditions, while atmospheric moisture is generally minimal.
4. Evaluate the role of groundwater: Groundwater is a consistent and reliable source of water for plants, especially through root absorption.
5. Conclude that groundwater is the main water source for land plants due to its availability and ability to be absorbed by plant roots.