Which one of the following groups of `structures// organs` have similar function

Options

A. Typholosle in earthworm, intestinal villi in rat, and
contractile vacuole in Amoeba .
B. Nephridian in earthworm, Malpighinan tubules in
cockroach, and urinary tubules in rat .
C. Antennae of cockroach , tympanum of frog, and
clitellum of earthworm .
D. Incisors of rat, gizzard ( proventriculus ) of cockroach,
and tube feet of startish.

Answer

To solve the question about which group of structures or organs have similar functions, we will analyze each option provided:

### Step 1: Understand the Options
We have four options to consider:
1. Typhalozole in earthworm, intestinal villi in rat, and contractile vacuole in amoeba.
2. Nephridian in earthworm, Malpighian tubules in cockroach, and urinary tubules in rat.
3. Antenna of cockroach, tympanum of frog, and clitellum of earthworm.
4. Incisors of rat, gizzard of cockroach, and tube feet of starfish.

### Step 2: Analyze Each Option
- **Option 1**: Typhalozole (increases surface area for absorption), intestinal villi (absorption of nutrients), and contractile vacuole (excretion of excess water). These structures do not share a similar function.

- **Option 2**: Nephridian (excretory organ in earthworm), Malpighian tubules (excretory organ in cockroach), and urinary tubules (excretory organ in rat). All these structures are involved in excretion and removal of nitrogenous waste.

- **Option 3**: Antenna (sensory organ), tympanum (hearing organ), and clitellum (reproductive structure). These do not share a similar function.

- **Option 4**: Incisors (teeth for cutting food), gizzard (grinds food), and tube feet (used for movement and feeding in starfish). These structures do not share a similar function.

### Step 3: Identify the Correct Answer
After analyzing all options, we find that **Option 2** is the only group where all structures have a similar function related to excretion. Therefore, the correct answer is **B**.

### Final Answer
The group of structures that have similar functions is:
**B. Nephridian in earthworm, Malpighian tubules in cockroach, and urinary tubules in rat.**

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