The organism A, B and C can obtain their food in three different ways. Organsim A derives its food from the body of another living organism which is called its, D without killing it. The organism B takes in the solid food by the process of ingestion, digests a part of this food and throws out undigested food in the process called E. The organism C obtains its food from dead and decaying plants.
(a) What is the mode of nutrition of (i) organism A (ii) organism B, and (iii) organism C ?
(b) What is the organism like D called ?
(c) Name the process E.
(d) Give one example each of organisms like (i) A (ii) B, and (iii) C.
(e) What is the general name of three modes of nutrition exhibited by organisms A, B and C ?

Answer

### Step-by-Step Solution:

**(a) Identify the mode of nutrition for each organism:**

1. **Organism A:**
- Organism A derives its food from the body of another living organism without killing it. This is known as **parasitic nutrition**.

2. **Organism B:**
- Organism B takes in solid food through ingestion, digests part of it, and expels the undigested food. This mode of nutrition is called **holozoic nutrition**.

3. **Organism C:**
- Organism C obtains its food from dead and decaying plants. This is referred to as **saprophytic nutrition**.

**(b) Identify the organism like D:**
- The organism D, from which organism A derives its nutrition, is called the **host**.

**(c) Name the process E:**
- The process E, through which organism B expels undigested food, is called **egestion**.

**(d) Provide examples for each organism:**
1. **Example for Organism A (parasitic):** Tapeworm.
2. **Example for Organism B (holozoic):** Amoeba.
3. **Example for Organism C (saprophytic):** Mushroom.

**(e) General name of the three modes of nutrition:**
- The general name for the three modes of nutrition exhibited by organisms A, B, and C is **heterotrophic nutrition**.