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Which part of the cactus helps it to reduce water loss to the hot and dry surroundings?
- a)Needle shaped leaves
- b)Fleshy stem
- c)Flowers
- d)Roots
Correct answer is option 'A'. Can you explain this answer?
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Which part of the cactus helps it to reduce water loss to the hot and ...
The part of the cactus that helps it to reduce water loss to the hot and dry surroundings is its needle-shaped leaves.
Cacti are well-adapted to survive in arid environments by minimizing water loss through various adaptations. Here's how the needle-shaped leaves contribute to reducing water loss:
1. Reduced Surface Area: The needle-shaped leaves of cacti have a reduced surface area compared to broad, flat leaves found in other plants. This reduces the exposure of the leaf surface to the surrounding dry air, helping to minimize water loss through evaporation.
2. Thick Cuticle: Cacti have a thick waxy cuticle on the surface of their needle-shaped leaves. This cuticle acts as a barrier, preventing water loss through the leaf surface by reducing evaporation.
3. Spines: The needle-shaped leaves of cacti often have spines, which further reduce water loss. The spines create a layer of still air around the plant, reducing air movement and transpiration.
4. Modified Stems: Cacti have fleshy stems that store water. These stems are covered with a layer of spines, which also help to reduce water loss. The storage capacity of the fleshy stems allows cacti to survive during prolonged periods of drought.
In conclusion, the needle-shaped leaves of cacti play a crucial role in reducing water loss to the hot and dry surroundings. Their reduced surface area, thick cuticle, spines, and fleshy stems all contribute to the plant's ability to survive in arid environments.
Cacti are well-adapted to survive in arid environments by minimizing water loss through various adaptations. Here's how the needle-shaped leaves contribute to reducing water loss:
1. Reduced Surface Area: The needle-shaped leaves of cacti have a reduced surface area compared to broad, flat leaves found in other plants. This reduces the exposure of the leaf surface to the surrounding dry air, helping to minimize water loss through evaporation.
2. Thick Cuticle: Cacti have a thick waxy cuticle on the surface of their needle-shaped leaves. This cuticle acts as a barrier, preventing water loss through the leaf surface by reducing evaporation.
3. Spines: The needle-shaped leaves of cacti often have spines, which further reduce water loss. The spines create a layer of still air around the plant, reducing air movement and transpiration.
4. Modified Stems: Cacti have fleshy stems that store water. These stems are covered with a layer of spines, which also help to reduce water loss. The storage capacity of the fleshy stems allows cacti to survive during prolonged periods of drought.
In conclusion, the needle-shaped leaves of cacti play a crucial role in reducing water loss to the hot and dry surroundings. Their reduced surface area, thick cuticle, spines, and fleshy stems all contribute to the plant's ability to survive in arid environments.
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Which part of the cactus helps it to reduce water loss to the hot and dry surroundings?a)Needle shaped leavesb)Fleshy stemc)Flowersd)RootsCorrect answer is option 'A'. Can you explain this answer?
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