Which plant is considered a noxious weed that has a chemical defence mechanism to protect it from predators?

Correct option is A

The correct answer is (a) Calotropis.
• Calotropis is considered a noxious weed with a chemical defense mechanism to protect it from predators.
• This plant contains toxic compounds such as cardenolides and alkaloids, which deter herbivores from consuming it.
• Calotropis is commonly known as milkweed and is found in arid and semi-arid regions.
• It produces a milky latex that can cause skin irritation and toxicity if ingested.
• The plant is also used in traditional medicine for its various therapeutic properties.
• Despite its toxicity, it plays a role in the ecosystem by providing habitat and food for certain insects like the monarch butterfly.
• The presence of Calotropis can be problematic for agriculture as it competes with crops for resources.