Question

In some plants like rose, stem is modified into spines. State the significance of

spines in such plants.​

Answer 1

Answer:

Most species of cacti have lost true leaves, having only spines, which are highly modified leaves, as well as defending against the herbivores. Spines help prevent water loss by reducing air flow close to the cactus. In the absence of leaves, enlarged stems carry out photosynthesis. These adaptations allow cactus species to grow in hot and dry places.

All the other 3 plants do not grow in dry and hot regions that is why their leaves are simple.

So, the answer is Catus

Explanation:

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