The question asks to identify the group of animals that does not breathe in the same way. Let's examine each group of animals and their breathing adaptations:
A: Water stick insect and water scorpion
- Both are aquatic insects that breathe through spiracles, small openings on their bodies that allow air to enter.
B: Tubifex worm and tadpole
- Tubifex worms are small segmented worms that live in water and obtain oxygen through their skin.
- Tadpoles are the larval stage of frogs and breathe through gills.
C: Crab and wood louse
- Both are crustaceans that have gills for breathing, which extract oxygen from water.
D: Water spider and great diving beetle
- Water spiders create a diving bell or air bubble that they carry with them underwater, enabling them to breathe.
- Great diving beetles also have a similar adaptation, where they store air under their wing covers to breathe underwater.
Therefore, the group of animals that does not breathe in the same way is B: Tubifex worm and tadpole. Tubifex worms breathe through their skin, while tadpoles breathe through gills.

Breathing Adaptations in Aquatic Animals

Aquatic animals have different adaptations for breathing in water due to the difference in their respiratory systems. Let's analyze the given options to determine the group of animals that do not breathe in the same way.

a) Water stick insect, water scorpion
- Both water stick insects and water scorpions are insects that live in freshwater habitats. They both have a specialized structure called a spiracle, which allows them to breathe air. They come to the water surface to take in oxygen through their spiracles.

b) Tubifex worm, tadpole
- Tubifex worms are small aquatic worms that live in the mud or sediment of freshwater environments. They respire through their body surface and obtain oxygen dissolved in the water. Tubifex worms do not have specialized breathing structures.

- Tadpoles, on the other hand, are the larval stage of amphibians, such as frogs. They have gills that allow them to extract oxygen directly from the water. Tadpoles respire by pumping water over their gills, extracting oxygen, and expelling carbon dioxide.

c) Crab, wood louse
- Crabs are crustaceans that live in marine and freshwater habitats. They have gills, which are specialized respiratory structures that extract oxygen from the water. Crabs breathe by pumping water over their gills, allowing oxygen exchange to occur.

- Woodlice, also known as roly-polies or pill bugs, are terrestrial crustaceans. They have a modified respiratory system called a pseudotrachea, which allows them to breathe air. Woodlice breathe by absorbing oxygen through their pseudotrachea.

d) Water spider, great diving beetle
- Water spiders are spiders that live in freshwater habitats. They build underwater webs and create air bubbles to breathe. They carry air bubbles trapped in their body hairs and use them as a respiratory supply.

- Great diving beetles are aquatic insects that live in freshwater. They have spiracles, similar to water stick insects and water scorpions, which allow them to breathe air. Great diving beetles come to the water surface to replenish their air supply.

From the given options, it is clear that the group of animals that does not breathe in the same way are the Tubifex worm and tadpole. While Tubifex worms respire through their body surface, tadpoles have gills for extracting oxygen from the water. Therefore, option B is the correct answer.