Understanding Amarbel (Cuscuta)

The question asks about the classification of Amarbel (Cuscuta) based on its mode of nutrition. Let's examine what Amarbel is and how it obtains food.

Amarbel (Cuscuta) is a type of plant that is often seen growing as a yellow, thread-like structure covering other plants. It lacks leaves and chlorophyll, which are essential for photosynthesis, the process by which most plants make their own food.

Mode of Nutrition in Amarbel (Cuscuta)

Since Amarbel (Cuscuta) cannot perform photosynthesis, it must obtain nutrients from another source. It does this by growing on a host plant and absorbing water and nutrients directly from the host's tissues using special structures called haustoria. This relationship where one organism benefits at the expense of another is known as parasitism.

Analyzing the Options

Let's look at the definitions of the given options to correctly classify Amarbel (Cuscuta):

• Autotroph: An organism that can produce its own food, usually through photosynthesis (like most green plants). Amarbel lacks chlorophyll, so it cannot do this.
• Parasite: An organism that lives on or inside another organism (the host) and obtains its food from or at the expense of its host. Amarbel fits this description perfectly as it depends entirely on the host plant for survival.
• Saprophyte: An organism that obtains nutrients from dead organic matter. Amarbel lives on living plants, not dead ones.
• Decomposer: Organisms that break down dead organic matter. Similar to saprophytes, decomposers feed on dead material, which is not the case for Amarbel.

Conclusion on Amarbel Classification

Based on its dependency on a living host plant for nutrition, Amarbel (Cuscuta) is a classic example of a parasite. It causes harm to the host plant by taking away its nutrients.

Therefore, Amarbel (Cuscuta) is a parasite.