Classification of Animals

Diagram of fish is given below —

1. Fishes belong to Class Pisces of Phylum Chordata.

2. Their streamlined body, which is narrow at both ends help reduce water resistance, allowing for more efficient and faster swimming.

3. Fishes do not breathe through nostrils, but through gills. Fish nostrils are used to detect chemicals in the water, aiding in finding food, identifying potential mates, and detecting danger.

4. Fishes breathe through the gills. The locomotory structures in fishes are their fins, which help in swimming.

5. Two examples of fishes are — Rohu and Catla.

1. Organism [A] is Sea-anemone, and Organism [B] is Hydra.

2. The guidelines 1 and 2 show:
   1 → Tentacles
   2 → Mouth

3. Yes, they both belong to the same Phylum, i.e. Cnidaria of Invertebrates.

4. Two important functions of Tentacles are:

   1. Tentacles help in catching food.
   2. Tentacles help in swimming.

5. We can see budding in Hydra, which is a form of asexual reproduction. This process involves the development of a new individual from an outgrowth or bud on the parent's body.

1. The given figure shows a Starfish. It belongs to phylum Echinodermata.

2. The locomotory structure present in Starfish are Tube feet.

3. Starfish are radially symmetrical.

4. Echinoderms are mainly found in marine habitat.

5. Starfish body is rough, spiny and radially symmetrical.

1. The animal shown in the given figure is Rabbit.

2. Rabbit belongs to Class Mammalia of Phylum Chordata.

3. A key distinguishing feature of the phylum Chordata is the presence of a backbone (vertebral column).

4. Two more examples of organisms belonging to Phylum Chordata are — Tiger and Elephant.

5. Rabbits, like all mammals, are warm-blooded (endothermic), meaning they can regulate their body temperature internally.

Three characteristic features of Amphibians which help to differentiate them from fishes are:

1. They can live in water as well as on land.
2. They breathe through lungs and skin.
3. Body is covered by a slimy and slippery skin

The fishes have streamlined body which means that their body is narrow at both ends. This helps them to swim by minimizing the resistance of water.

The respiratory organ of fish is gills.

Two characteristic features of birds which enable them to fly are:

1. Their bones are hollow and light which make their body light.
2. They have wings to fly.

Two birds which cannot fly are Ostrich and Kiwi.

Rohu

Reason — Rohu is a fish.

Ostrich

Reason — Ostrich is a flightless bird.

Earthworm

Reason — Earthworm is classified under Annelids.

Lizard

Reason — Lizards belong to Class Reptilia and are vertebrates.

Platyhelminthes

Reason — Liver fluke belongs to Platyhelminthes.

Teeth

Reason — Birds have jaws provided with horny beak but have no teeth.

Tube feet

Reason — Echinoderms move with the help of tube feet.

Both (1) and (3)

Reason — Both Coelenterata and Echinodermata have radially symmetrical bodies.

Reptilia

Reason — Reptiles have dry and scaly skin.

Four pairs of legs

Reason — Arachnids have four pairs of jointed legs.

1. Fixed animal with a pore-bearing body — Sponge

2. Star-shaped body — Starfish

3. Can live in water as well as on land — Frog

4. Has a flattened ribbon-like body — Tapeworm

CLASSIFICATION :

• Butterfly, Grasshopper, Honeybee and Scorpion are Arthropods.

The scientific name for such organisms is Heterotrophs.

1. Amphibia
   Example — Frogs

2. Porifera
   Example — Sponge

3. Arthropoda
   Example — Crabs

4. Pisces
   Example — Rohu

5. Annelida
   Example — Earthworms

1. Odd one — Dogfish
   Category of the remaining terms — Coelenterata

2. Odd one — Starfish
   Category of the remaining terms — Pisces

3. Odd one — Mammalia
   Category of the remaining terms — Arthropoda

4. Odd one — Frog
   Category of the remaining terms — Reptiles

5. Odd one — Fins
   Category of the remaining terms — Locomotory structures in invertebrates

1. Amphibians breathe through lungs and skin.
2. Slimy scales are found on the body of fish.
3. Gills are covered and protected by an operculum.
4. Ascaris is an unsegmented roundworm.
5. Arachnids have four pairs of jointed legs.

1. Porifera, Cnidaria, Platyhelminthes, Nematoda, Annelida, Arthropoda, Mollusca, and Echinodermata.
2. Pisces, Amphibia, Reptilia, Aves, and Mammalia.
3. Crustacea, Myriapoda, Insecta, and Arachnida.
4. Head, Thorax, and Abdomen.
5. Ostrich, Penguin, and Kiwi.

1. Heterotrophs — Heterotrophs are organisms that cannot produce their own food and obtain nutrients by consuming other organisms.

2. Locomotion — Most animals move from one place to another mainly in search of food or shelter. Such a movement is called locomotion.

3. Invertebrates — The animals that do not have a back bone are called invertebrates.

4. Vertebrates — Animals with a backbone (vertebral column) are called vertebrates.

5. Mammals — Mammals are animals that gives birth to young ones (babies), and feeds its young on milk from the mother's body. Mammals have body covered with hair, possess projecting external ears, have four limbs, and a tail (except humans).

1. Tentacles — Tentacles are found in Cnidarians. These finger-like projections surrounding the mouth, called tentacles help in catching food and swimming.

2. Nephridia — Nephridia are found in Annelids. Nephridia are special organs for excretion.

3. Gills — Gills are found in Class Pisces. Gills help fishes breathe.

4. Muscular foot — Muscular foot is found in Molluscs. Mulluscs move with the help of a muscular foot.

5. Mammary glands — Mammary glands are found in mammals (females). Young ones suckle milk from mammary glands present in mothers.

1. Amphibians — Frog, Toad

2. Segmented worms — Earthworm, Leech

3. Reptiles — Lizard, Snake

4. Coelenterates — Hydra, Jellyfish

5. Arthropods — Prawn, Ant

6. Flatworms — Tapeworm, Liverfluke

Two animals which are found as parasites inside the human intestine are Tapeworm and Roundworm.