Answer:
A dense layer of spines or hairs assists plants of cool deserts by reducing solar radiation absorption.
The answer is option ⇒b
Step-by-step explanation:
Here's a clear and concise explanation:
1. Purpose of spines or hairs:
- Plants in cool deserts face harsh environmental conditions, including intense solar radiation and limited water availability.
- To adapt to these conditions, certain desert plants have evolved a dense layer of spines or hairs on their surfaces.
2. Reduction of solar radiation absorption:
- The dense layer of spines or hairs acts as a physical barrier, reducing the amount of solar radiation that reaches the plant's surface.
- This helps to minimize the absorption of solar radiation, which can be excessive and potentially harmful to the plant.
3. Benefits of reducing solar radiation absorption:
- By reducing solar radiation absorption, plants can minimize the amount of heat gained from the sun.
- This helps to prevent overheating, maintain cooler leaf temperatures, and reduce water loss through evaporation.
Example:
- Let's consider the cactus as an example of a plant in a cool desert.
- Many cacti have a dense layer of spines covering their surfaces.
- These spines serve to reduce the amount of solar radiation absorbed by the cactus, protecting it from excessive heat and conserving water.
The answer is option ⇒b) Reducing solar radiation absorption