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Which of the following is not a modification of leaf?
  • a)
    Fleshy leaves of onion
  • b)
    Tendrils in pea
  • c)
    Spines of cacti
  • d)
    Thorns in Bougainvillea
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
Which of the following is not a modification of leaf?a)Fleshy leaves ...
The hard, pointed structures found in certain plants like Bougainvillea and Duranta are known as thorns. These thorns are modifications of the axillary bud and sometimes terminal buds of the stem. These thorns function as a check to the rate of transpiration. They also protect the plants from being chewed off by animals.
The cactus spines are the leaf modification present on a fleshy phylloclade-a stem modification together with bristles. The spines reduce the rate of transpiration and water loss in cactus.
Tendril is a leaf modification into a thread­-like structure. This helps the weak-stemmed plants in climbing and providing support. Garden pea is an example of the leaf modified tendril.
The fleshy scales of the onion represent the leaves in onion and are meant for the storage of food. This is an example of an underground modification.
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Which of the following is not a modification of leaf?a)Fleshy leaves ...


Thorns in Bougainvillea

Bougainvillea plants have thorns, not leaves. Thorns are modified branches or stems that have a sharp point and serve as a defense mechanism for the plant. Thorns are different from spines, which are modified leaves.

Other modifications of leaves:
- Fleshy leaves of onion: Onions have modified leaves that store water and nutrients, making them fleshy.
- Tendrils in pea: Pea plants have modified leaflets that are modified into tendrils, which help the plant climb and support itself.
- Spines of cactus: Cacti have modified leaves that have evolved into spines to reduce water loss and protect the plant from herbivores.
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Which of the following is not a modification of leaf?a)Fleshy leaves of onionb)Tendrils in peac)Spines of cactid)Thorns in BougainvilleaCorrect answer is option 'D'. Can you explain this answer?
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