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CNMS ICSE - 7 Std
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Chapter: 03. Kingdom Animalia

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What is the primary feature used to distinguish vertebrates from invertebrates?
Vertebrates possess an internal vertebral column or backbone, which is entirely absent in invertebrates.
Where are Poriferans typically found and how do they live?
Poriferans are mainly found in the sea attached to the bottom, though a few species occur in freshwater.
What is the function of the large opening at the top of a sponge’s body?
The large pore or opening at the top of a sponge’s body is used to expel the water drawn in through its smaller body pores.
Name two examples of organisms belonging to the phylum Coelenterata.
Hydra and sea anemone are two examples of organisms belonging to the phylum Coelenterata.
How does a tapeworm absorb digested food from the human host?
The tapeworm absorbs digested food directly through its segments from the host’s intestine.
What are the common disease-causing parasites belonging to the phylum Nemathelminthes?
Ascaris, hookworms, and threadworms are disease-causing parasites belonging to the phylum Nemathelminthes.
Which special excretory organs are found in segmented worms?
Segmented worms utilize special excretory organs called nephridia to eliminate waste.
Why is the earthworm commonly referred to as the farmer’s friend?
The earthworm makes the soil porous and fertile through its burrowing and soil-feeding habits, which increases aeration and water absorption.
What are the three distinct body regions of an insect?
The body of an insect is divided into the head, the thorax, and the abdomen.
How do arachnids differ in their appendages compared to insects?
Arachnids have six pairs of appendages including four pairs of walking legs, whereas insects have three pairs of legs and normally two pairs of wings.
What are the characteristic structures used for locomotion in molluscs?
Molluscs utilize a muscular foot for locomotion.
Provide two examples of animals belonging to the phylum Echinodermata.
Starfish and sea urchin are two examples of animals belonging to the phylum Echinodermata.
How do fishes breathe in their aquatic environment?
Fishes breathe in water through special respiratory organs called gills.
How do adult amphibians breathe differently when on land versus when in water?
Adult amphibians breathe through their lungs when on land and through their slimy skin when in water.
Why are reptiles classified as cold-blooded animals?
Reptiles are cold-blooded because their body temperature changes in response to changes in the environmental temperature.
What structural adaptation allows birds to perch securely on trees?
Birds possess claws on their feet that are specifically adapted for perching on trees.
What are the two defining external characteristics of mammals?
Mammals are characterized by a body covered with hair and the presence of projecting external ears.
Why are whales and dolphins classified as mammals rather than fish?
Whales and dolphins are classified as mammals because they have hair on their bodies and possess mammary glands to feed their young.
Which mammal is recognized as the only flying mammal?
The bat is the only flying mammal.
Where do reptiles and amphibians lay their eggs respectively?
Reptiles lay their leathery eggs on dry land, whereas amphibians return to water to lay their eggs.
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