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Answer key

Chapter: 03. Kingdom Animalia

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Practice Exam Paper: Kingdom Animalia

Class: VII (Grade 7) ​Subject: Biology ​Time Allowed: 2 Hours ​Max Marks: 50
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Section A: Multiple Choice Questions (5 Marks)

Choose the correct option for each of the following questions.
A four-chambered heart is found in which of the following groups? (a) Birds only (b) Mammals only © Amphibians (d) Both birds and mammals
Which of the following organs is used for excretion in segmented worms (Annelids)? (a) Parapodia (b) Nephridia © Gills (d) Tentacles
Which of the following is the only flying mammal? (a) Pigeon (b) Ostrich © Bat (d) Seahorse
In which group of Arthropods are the head and thorax fused, and they possess four pairs of walking legs? (a) Insects (b) Crustaceans © Arachnids (d) Myriapods
Which of these animals belongs to Phylum Echinodermata? (a) Octopus (b) Starfish © Snail (d) Tapeworm
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Section B: Fill in the Blanks (5 Marks)

Fill in the blanks with suitable words. Use exactly ‘_ _ _ _ _ _ _ _ _ _ _ _ _ _’ for the blank space.
Invertebrates with jointed legs are classified under the phylum _ _ _ _ _ _ _ _ _ _ _ _ _ _.
A female kangaroo keeps her premature young ones in an abdominal pouch called the _ _ _ _ _ _ _ _ _ _ _ _ _ _.
The body of a fish is _ _ _ _ _ _ _ _ _ _ _ _ _ _, which reduces resistance and helps it swim easily in water.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ have thin, soft, and flat bodies, and they mostly live as parasites inside host animals.
The special finger-like processes surrounding the mouth of coelenterates used for catching food are called _ _ _ _ _ _ _ _ _ _ _ _ _ _.
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Section C: True or False (5 Marks)

State whether the following statements are True or False. If false, rewrite the statement correctly.
Starfish is an example of a vertebrate animal.
Whales and dolphins are classified as mammals, not fish.
Reptiles have dry, scaly skin and are warm-blooded animals.
Millipedes have two pairs of legs in each of their body segments.
Sponges are freshwater or marine animals belonging to the phylum Porifera.
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Section D: Differentiate Between (6 Marks)

Differentiate between the following pairs based on the criteria specified in the brackets.
Invertebrates and Vertebrates (Based on internal skeleton and backbone)
Amphibians and Reptiles (Based on heart chambers and skin texture)
Flatworms (Platyhelminthes) and Roundworms (Nemathelminthes) (Based on body shape and segmentation)
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Section E: Diagram-Based Question (5 Marks)

An anatomical diagram of a fish showing its external structure and features.
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Identify the parts labeled 1, 2, 3, and 4 in the diagram.
State the primary function of the part labeled 2.
How does the general shape of this animal’s body help it survive in its habitat?
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Section F: Short Answer Questions (8 Marks)

Answer the following questions briefly.
State two main characteristic features of Kingdom Animalia.
What makes the tapeworm highly adapted to living as a parasite in the human intestine?
Mention the function of the hard shell in soft-bodied animals (Molluscs) and give two examples of this phylum.
Why do amphibians need to return to water bodies, whereas reptiles can successfully reproduce on dry land?
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Section G: Environmental & Everyday Life Applications (6 Marks)

Apply your scientific knowledge to answer the following questions.
While working in a garden, you find an earthworm burrowing into the soil. Why is this animal widely referred to as the “farmer’s friend”? Explain its impact on the soil.
If you see a bat flying in the evening, how can you argue that it is a mammal and not a bird, despite its ability to fly? Provide three structural reasons.
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Section H: Long Answer Questions (10 Marks)

Answer the following questions in detail.
The phylum Arthropoda is divided into four distinct groups. Name these four groups, state their unique characteristic features (including body divisions and limbs), and provide one example for each group.
Describe the characteristic features of Class Mammalia. Highlight how mammals are different from birds regarding their body covering, teeth, and reproduction.
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