In Bougainvillea thorns are the modifications of :a)Adventitious rootb)Stemc)Leafd)StipulesCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Option B is correct, aerial stem of bougainvillea, citrus modifide into thorns for the protection from grazing animals...

Answer

Answer

It is a modification of stem.Axiallary buds of stems get modified into wood ,straight pointed structures called thorns .These structures protect  plants from browsing animals.eg Citrus, Bougainville

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**Explanation:**

Bougainvillea is a thorny ornamental vine that belongs to the family Nyctaginaceae. It is known for its vibrant and colorful bracts, which are modified leaves that surround the small, inconspicuous flowers. The thorns on a Bougainvillea plant are modified stems and not any other plant part such as adventitious root, leaf, or stipule.

**Thorns as Modified Stems:**

Thorns are sharp, pointed structures that arise from the stem of a plant. They serve various purposes such as protection against herbivores, providing support to climbing plants, and preventing water loss through transpiration. In the case of Bougainvillea, the thorns are modified stems.

**Reasoning:**

1. Bougainvillea plants have a woody stem, which serves as the main axis of growth and provides structural support to the plant.
2. Thorns on Bougainvillea plants are typically found along the stems and branches.
3. They have a similar appearance to regular stem branches but are sharper and rigid.
4. Thorns are formed by the modification of axillary buds, which are located in the leaf axils.
5. These axillary buds develop into thorns instead of growing into branches or leaves.
6. Thorns aid in protecting the plant from herbivores and provide support for climbing as Bougainvillea plants are often grown as climbers.
7. The presence of thorns helps deter animals from damaging or feeding on the plant.
8. Thorns also act as a defense mechanism against herbivores by inflicting pain or injury.

**Conclusion:**

In conclusion, the thorns in Bougainvillea are modified stems. They are formed through the modification of axillary buds and serve multiple functions, including protection and support. It is important to understand the different types of plant modifications to gain a deeper understanding of their structure and functions.

Answer

Stem ...

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Thorn is the modified stem helps in reducing the transpiration and avoid grazing by herbivores animals

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Ans. is stem. thorns (sharp cony structure)helps bougnvilla to avoid grazing of animals..

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The modification of bougainvillea is 'thorn'which is a stem modification.^_^;
So, ans-B

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Thorns are modification of stem. so, option b

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Stem

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The thorn is a pointed, hard structure and is a modified stem in Bougainvillea. Their axillary bud is modified into a thorn. This modification reduces the rate of transpiration and also prevents herbivore grazing....

Answer

Its B

Answer

Stem modifications (aerial)

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Stem.

Answer

Option B is correct because it is  aerial stem modification that is thorn

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