The correct option is
C. xerophytes.
Detailed Explanation:
Definition of Xerophytes:
Xerophytes are specialized plants that have adapted to survive in environments where water is scarce. These adaptations allow them to minimize water loss and maximize water retention, making them well-suited for arid or semi-arid conditions.
Adaptations of Xerophytes:
1.
Reduced Leaf Surface Area: Many xerophytes have small, thick leaves or even spines (like cacti) to reduce the surface area from which water can evaporate.
2.
Thick Cuticle: They often possess a thick waxy cuticle on their leaves and stems, which acts as a barrier to water loss.
3.
Deep Root Systems: Xerophytes typically have extensive root systems that can reach deep into the soil to access moisture that is not available to other plants.
4.
Water Storage: Some xerophytes, such as succulents, can store water in their tissues, allowing them to survive long periods without rainfall.
5.
CAM Photosynthesis: Many xerophytes utilize Crassulacean Acid Metabolism (CAM) for photosynthesis, which allows them to open their stomata at night instead of during the day, reducing water loss.
Why Other Options Are Incorrect:
A. Bryophytes:
- Bryophytes, such as mosses and liverworts, are non-vascular plants that typically thrive in moist environments. They require a certain level of water for reproduction (specifically for sperm to swim to the egg) and are not adapted to survive in dry conditions. Therefore, they are not suitable for areas with limited water supply.
B. Mesophytes:
- Mesophytes are plants that grow in environments with a moderate supply of water. They are not specifically adapted to survive in dry conditions; rather, they thrive in areas where water is readily available. Examples include many common garden plants and trees. Thus, they do not fit the criteria of surviving in limited water supply areas.
D. Hydrophytes:
- Hydrophytes are aquatic plants that live in water or very moist environments. They are adapted to submerged or saturated conditions and are not capable of surviving in dry areas. Examples include water lilies and cattails. Therefore, they are the opposite of xerophytes.
Summary of Key Points:
- Xerophytes are specialized plants adapted to survive in dry environments with limited water supply.
- They have unique adaptations such as reduced leaf surface area, thick cuticles, deep root systems, and water storage capabilities.
- Bryophytes require moist conditions, mesophytes thrive in moderate water availability, and hydrophytes are adapted to aquatic environments, making them unsuitable for dry areas.
Revision Summary:
- Xerophytes are plants adapted to arid conditions with limited water.
- Key adaptations include thick cuticles, reduced leaves, and deep roots.
- Bryophytes, mesophytes, and hydrophytes are not suited for dry environments.
- Understanding plant adaptations is crucial for identifying their ecological niches.